Eric Tsai
BLE ADV sensor for 2-pin interrupt (i.e. window/door sensor w/ reed switch)
Dependencies: BLE_API mbed nRF51822
Basic door/window sensor for nRF51822 BLE modules.
Diff: main.cpp
- Revision:
- 12:9bb01e063498
- Parent:
- 11:4f925834167d
--- a/main.cpp Sat Jul 29 22:01:45 2017 +0000
+++ b/main.cpp Sun Aug 27 05:48:45 2017 +0000
@@ -1,14 +1,32 @@
-/*
-Eric Tsai
+/*
+ * Copyright (c) Eric Tsai 2017
+ *
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ * Credit: started with the basic BLE Temperature Beacon code from mbed Bluetooth Low Energy team
+ * https://developer.mbed.org/teams/Bluetooth-Low-Energy/code/BLE_TemperatureBeacon/file/0a8bbb6dea16/main.cpp
+ *
+ * BLE sensor as Beacon advertisements. Intended to function with specific BLE observer.
+ * Tested on nRF51822 targets on mbed.
+ * keywords: todo, tochange
+*/
-7/29/2017: added clock algorithm to corresond with gateway spoof checking
-
- */
-//required to call the ecb functions
extern "C"
{
- #include "nrf_ecb.h"
+ #include "nrf_ecb.h" //required to call the ecb functions for encryption
}
#include "mbed.h"
@@ -16,65 +34,97 @@
#include "ble/BLE.h"
#include "TMP_nrf51/TMP_nrf51.h"
-//comment out when done with debug uart, else eats batteries
-#define MyDebugEnb 0
-//Pin "P0.4" on nRF51822 = mbed "p4".
-//InterruptIn is pulled-up. GND the pin to activate.
-
-// waveshare board ******
-//InterruptIn button1(p10);
-//InterruptIn button2(p11);
-
-// purple board ******
-//InterruptIn button1(p23);
-//InterruptIn button2(p24);
-
-// universal
-InterruptIn button1(p0);
-InterruptIn button2(p1);
+/*******************************************************************************************
+ * START tochange: items that may need customization depending on sensors, hardware, and desired behavior
+*******************************************************************************************/
+const uint16_t Periodic_Update_Seconds = 20; //number of seconds between periodic I/O status re-transmits 900s =15 min.
+#define MyDebugEnb 0 //enables serial output for debug, consumes ~1mA when idle
+uint8_t magnet_near=0; //this I/O, specifically for reed switch sensor
+/* hardware interrupt pins, selected based on hardware
+ *Syntax: Pin "P0.4" on nRF51822 documentation is mbed "p4".
+ * InterruptIn is pulled-up. GND the pin to activate.
+*/
+InterruptIn button1(p0); //nRF51822 P0.0
+InterruptIn button2(p1); //nRF51822 P0.1
+/******************************************************************************************
+ * END tochange
+*******************************************************************************************/
-//Serial device(p9, p11); // tx, rx, purple board and Rigado
+
#if MyDebugEnb
-// if you see ~1mA consumption during sleep, that's because uart is enabled.
+// if you see ~1mA consumption during sleep, that's because MyDebugEnb==1, it's enabled.
Serial device(p9, p11); //nRF51822 uart : TX=p9. RX=p11
#endif
+static Ticker Tic_Stop_Adv; //used to stop advertising after X seconds
+static Ticker Tic_Debounce; //debounce I/O
+static Ticker Tic_Periodic; //transmit sensor data on a periodic basis outside I/O events
-static Timer myTimer; //timed advertising
-static Ticker tic_adv; //stop adv
-static Ticker tic_debounce; //debounce I/O
-static Ticker tic_periodic; //regular updates
-static Ticker tic_clock_reset; //resets clock
-const uint16_t Periodicity = 180; //clock periodicity used for spoof checking, should be 1800 seconds for 30minutes
-//static TMP_nrf51 tempSensor;
-static bool flag_update_io = false;
-static bool flag_periodic_call = false;
-static bool flag_detach_adv_tic = false;
-static bool flag_set_debounce_tic = false; //not used
+const uint16_t Periodicity = 1800; //birthday periodicity used for spoof checking, must match gateway. Should be 1800 seconds for 30minutes
+static Timer Tmr_From_Birthday; //holds number of seconds since birthday, for spoof detection
+static Ticker Tic_Birthday; //resets Tmr_From_Birthday every Periodicity seconds, for spoof detection
+
-//static DigitalOut alivenessLED(LED1, 1);
-float mySensor = 2.0f;
+static bool Flag_Update_IO = false; //flag to indicate event is hardware interrupt
+static bool Flag_Periodic_Call = false; //flag to indicate event is periodic callback
+static bool Flag_Detach_Adv_Tic = false; //flag to stop advertising
+
+/* Optional: Device Name, add for human read-ability */
+const static char DEVICE_NAME[] = "LOL";
-/* Optional: Device Name, add for human read-ability */
-const static char DEVICE_NAME[] = "CUU";
+//Advertisement Data
+//note: AdvData[] holds bytes [5] to byte [30] of entire advertising data. The user content part after ADV flag and header
+static uint8_t AdvData[] = {0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0}; //26 Bytes manufacturer specific data
+char buffer[10]={0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; //hold I/O reading json
+char bat_volt_char[6] = {0, 0, 0, 0, 0, 0}; //hold json for battery reading
+uint8_t Adv_First_Section[10]; //holds the first several bytes with a pattern indicating this sensor is "one of ours"
+uint8_t mac_reverse[6] = {0x0,0x0,0x0,0x0,0x0,0x0}; //mac address for this module
-/* You have up to 26 bytes of advertising data to use. */
-/*
-Advertisement
+/***** Advertisement structure is 31 Bytes ****************
+
+https://docs.mbed.com/docs/ble-intros/en/latest/Advanced/CustomGAP/
-*/
-//full with nullls
-static uint8_t AdvData[] = {0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0}; /* Example of hex data */
-char buffer[10]={0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; //battery analog reading
-char bat_volt_char[6] = {0, 0, 0, 0, 0, 0};
-uint8_t Adv_First_Section[10];
-uint8_t mac_reverse[6] = {0x0,0x0,0x0,0x0,0x0,0x0};
-uint8_t magnet_near=0;
+Full Advertisement:
+First 5 bytes are set by stack according to flag and header parameters.
+Last 26 bytes are user data
+-- tabbed --
+Byte 0 | AD1 Length | 0x02 | AD1 is 2 bytes long
+Byte 1 | AD1 Type | 0x01 | AD1 Data interpreted as flag
+Byte 2 | AD1 Data 0 | 0x06 | AD1 Data flag mean "00000110"
+Byte 3 | AD2 Length | 0x1B | AD2 is 27 bytes (0x1B) long (rest of this data)
+Byte 4 | AD2 Type | 0xFF | 0xFF mean Manufacturer Specific Data
+Byte 5 | AD2 Data 0 | ADV_Data[0] | "our device" flag, MAC[3]
+Byte 6 | AD2 Data 1 | ADV_Data[1] | "out device" flag, MAC[2]
+Byte 7 | AD2 Data 2 | ADV_Data[2] | "out device" flag, MAC[1]
+Byte 8 | AD2 Data 3 | ADV_Data[3] | "out device" flag, MAC[0]
+Byte 9 | AD2 Data 4 | ADV_Data[4] | battery voltage json MSB, ie 3 in 3.14
+Byte 10 | AD2 Data 5 | ADV_Data[5] | battery voltage json
+Byte 11 | AD2 Data 6 | ADV_Data[6] | battery voltage json
+Byte 12 | AD2 Data 7 | ADV_Data[7] | battery voltage json LSB, ie 4 in 3.14
+Byte 13 | AD2 Data 8 | ADV_Data[8] | reserved
+Byte 14 | AD2 Data 9 | ADV_Data[9] | reserved
+Byte 15 | AD2 Data 10 | ADV_Data[10] Encrypted | spoof - clock high byte, range 0 to 1800 seconds
+Byte 16 | AD2 Data 11 | ADV_Data[11] Encrypted | spoof - clock low byte
+Byte 17 | AD2 Data 12 | ADV_Data[12] Encrypted | Xmit_Cnt - increments per transmit event, 0-255
+Byte 18 | AD2 Data 13 | ADV_Data[13] Encrypted | JSON[0]
+Byte 19 | AD2 Data 14 | ADV_Data[14] Encrypted | JSON[1]
+Byte 20 | AD2 Data 15 | ADV_Data[15] Encrypted | JSON[2]
+Byte 21 | AD2 Data 16 | ADV_Data[16] Encrypted | JSON[3]
+Byte 22 | AD2 Data 17 | ADV_Data[17] Encrypted | JSON[4]
+Byte 23 | AD2 Data 18 | ADV_Data[18] Encrypted | JSON[5]
+Byte 24 | AD2 Data 19 | ADV_Data[19] Encrypted | JSON[6]
+Byte 25 | AD2 Data 20 | ADV_Data[20] Encrypted | JSON[7]
+Byte 26 | AD2 Data 21 | ADV_Data[21] Encrypted | JSON[8]
+Byte 27 | AD2 Data 22 | ADV_Data[22] Encrypted | JSON[9]
+Byte 28 | AD2 Data 23 | ADV_Data[23] Encrypted | JSON[10]
+Byte 29 | AD2 Data 24 | ADV_Data[24] Encrypted | JSON[11]
+Byte 30 | AD2 Data 25 | ADV_Data[25] Encrypted | JSON[12]
+***************************************************/
static uint8_t key[16] = {0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4};
@@ -86,7 +136,6 @@
static uint8_t des_buf[16] = {0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4};
uint8_t Xmit_Cnt = 1;
-//const static uint8_t AdvData[] = {"ChangeThisData"}; /* Example of character data */
@@ -105,8 +154,6 @@
//app ID is 16 bit, (0xFEFE)
uint16_t applicationSpecificId; /* An ID used to identify temperature value in the manufacture specific AD data field */
- //float = 32-bit.
- //tsai: change this to uint32_t!!!
TMP_nrf51::TempSensorValue_t tmpSensorValue; /* this is a float (32-bit), user data */
} PACKED;
@@ -114,46 +161,24 @@
void debounce_Callback(void)
{
- tic_debounce.detach();
- flag_set_debounce_tic = false; //not used
- flag_update_io = true; //start advertising
+ Tic_Debounce.detach();
+ Flag_Update_IO = true; //start advertising
/* Note that the buttonPressedCallback() executes in interrupt context, so it is safer to access
* BLE device API from the main thread. */
- //buttonState = PRESSED;
+
}
-//----- button rising ---
+//ISR for I/O interrupt
void buttonPressedCallback(void)
{
-
-
- //flag_update_io = true;
-
- tic_debounce.attach(debounce_Callback, 1); //ok to attach multiple times, first one wins
-
-
- //buttonState = PRESSED;
-
- /*
- if (flag_set_debounce_tic == false)
- {
- flag_set_debounce_tic = true;
-
- }
- */
+ Tic_Debounce.attach(debounce_Callback, 1); //ok to attach multiple times, recent one wins
}
-//----- button falling ---
+//ISR for I/O interrupt
void buttonReleasedCallback(void)
{
-
- //flag_update_io = true;
-
- tic_debounce.attach(debounce_Callback, 1);
-
-
-
+ Tic_Debounce.attach(debounce_Callback, 1);
}
@@ -162,42 +187,40 @@
//stops advertising after X seconds
/* Note that the Callback() executes in interrupt context, so it is safer to do
* heavy-weight sensor polling from the main thread (where we should be able to block safely, if needed). */
-
- //tic_adv.detach();
-
- flag_detach_adv_tic = true;
- //ble.gap().stopAdvertising();
-
+ Flag_Detach_Adv_Tic = true;
+
+}
+/* ****************************************
+ * Decides what actions need to be performed on periodic basis
+*******************************************/
+void periodic_Callback(void)
+{
+ Flag_Update_IO = true;
+ Flag_Periodic_Call = true;
}
-
-
-
-void periodic_Callback(void)
-{
- flag_update_io = true;
- flag_periodic_call = true;
-}
-
+/* ****************************************
+ * No RTC available, tickers only have a 35 minute range.
+ * So periodicity for spoof avoidance is set to 30 minutes
+*******************************************/
void clock_reset_Callback(void)
{
#if MyDebugEnb
device.printf("===== reset timer =====");
device.printf("\r\n");
#endif
- myTimer.reset();
+ Tmr_From_Birthday.reset();
};
+
void setupApplicationData(ApplicationData_t &appData)
{
// two byte ID: 0xFEFE
static const uint16_t APP_SPECIFIC_ID_TEST = 0xFEFE; //2 byte application ID
appData.applicationSpecificId = APP_SPECIFIC_ID_TEST;
- //appData.tmpSensorValue = tempSensor.get();
- appData.tmpSensorValue = mySensor;
}
@@ -210,6 +233,8 @@
/* Initialization error handling should go here */
}
+
+
/**
* Callback triggered when the ble initialization process has finished
*/
@@ -237,23 +262,18 @@
ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
-
//from GAP example
/* Sacrifice 2B of 31B to AdvType overhead, rest goes to AdvData array you define */
ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::MANUFACTURER_SPECIFIC_DATA, AdvData, sizeof(AdvData));
/* Setup advertising parameters: not connectable */
ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_NON_CONNECTABLE_UNDIRECTED);
- ble.gap().setAdvertisingInterval(300); //one advertisment every 300ms. Self tickers, so you don't have to worry.
+ ble.gap().setAdvertisingInterval(900); //one advertisment every 300ms. Self tickers, so you don't have to worry.
+}
- //don't start advertising on init. Only advertise on pin interrupt.
- //ble.gap().startAdvertising();
-}
-
//not needed anymore
-//https://developer.mbed.org/users/MarceloSalazar/notebook/measuring-battery-voltage-with-nordic-nrf51x/
void my_analogin_init(void)
{
@@ -267,7 +287,13 @@
NRF_ADC->ENABLE = ADC_ENABLE_ENABLE_Enabled;
}
-uint16_t my_analogin_read_u16(void)
+
+/* ****************************************
+ * Read battery voltage using bandgap reference
+ * shunt Vdd to ADC, thanks to Marcelo Salazar's notes here:
+ * https://developer.mbed.org/users/MarceloSalazar/notebook/measuring-battery-voltage-with-nordic-nrf51x/
+*******************************************/
+uint16_t read_bat_volt(void)
{
//10 bit resolution, route Vdd as analog input, set ADC ref to VBG band gap
//disable analog pin select "PSEL" because we're using Vdd as analog input
@@ -288,7 +314,7 @@
//while loop doesn't actually loop until reading comlete, use a wait.
while (((NRF_ADC->BUSY & ADC_BUSY_BUSY_Msk) >> ADC_BUSY_BUSY_Pos) == ADC_BUSY_BUSY_Busy) {};
- wait_ms(2);
+ wait_ms(1);
//save off RESULT before disabling.
//uint16_t myresult = (uint16_t)NRF_ADC->RESULT;
@@ -299,9 +325,16 @@
return (uint16_t)NRF_ADC->RESULT; // 10 bit
//return myresult;
-}
+} //end read_bat_volt
+
+
-uint16_t my_analog_pin_read(void)
+/* ****************************************
+ * Read battery voltage using bandgap reference
+ * shunt analog pin to ADC, from API here
+ * https://developer.mbed.org/users/mbed_official/code/mbed-src/file/cb4253f91ada/targets/hal/TARGET_NORDIC/TARGET_NRF51822/analogin_api.c
+*******************************************/
+uint16_t read_ADC_pin(void)
{
//10 bit resolution, route PSEL pin as 1/3 input sel,
@@ -324,7 +357,7 @@
//while loop doesn't actually loop until reading comlete, use a wait.
while (((NRF_ADC->BUSY & ADC_BUSY_BUSY_Msk) >> ADC_BUSY_BUSY_Pos) == ADC_BUSY_BUSY_Busy) {};
- wait_ms(2);
+ wait_ms(1); //needed because busy while loop doesn't run.
//save off RESULT before disabling.
//uint16_t myresult = (uint16_t)NRF_ADC->RESULT;
@@ -335,10 +368,14 @@
return (uint16_t)NRF_ADC->RESULT; // 10 bit
//return myresult;
-}
+} //end read_ADC_pin
-//hash_first_section(Adv_First_Section, mac_reverse, bat_reading);
+/* ****************************************
+ * Pattern scheme indicating "one of ours"
+ * generate first part of ADV data so that observer can recognize it as "one of ours".
+ * use specific schema to decide how we're recognizing our sensor ADV
+*******************************************/
void hash_first_section(uint8_t * dest, const uint8_t * mac_addr, const char * bat_volt_str)
{
dest[0] = mac_addr[3];
@@ -351,46 +388,39 @@
dest[7] = bat_volt_str[3];
dest[8] = 0x10;
dest[9] = 0x11;
-#if MyDebugEnb
-
- device.printf("hash array: ");
- for (int i=0; i<10; i++)
- {
- device.printf("%x ", dest[i]);
- }
- device.printf("\r\n");
-#endif
+ #if MyDebugEnb
+
+ device.printf("hash array: ");
+ for (int i=0; i<10; i++)
+ {
+ device.printf("%x ", dest[i]);
+ }
+ device.printf("\r\n");
+ #endif
}
-uint16_t clock_remainder = 0;
-
+/* ****************************************
+ *
+ * Main Loop
+ *
+*******************************************/
int main(void)
{
-#if MyDebugEnb
- device.baud(9600);
- device.printf("started sensor node 36 ");
- device.printf("\r\n");
-#endif
+ #if MyDebugEnb
+ device.baud(9600);
+ device.printf("started sensor node 36 ");
+ device.printf("\r\n");
+ #endif
-
- //Timer myTimer; //moved to global
- myTimer.start();
-
+ Tmr_From_Birthday.start(); //tracks # sec since birthday
- button1.fall(buttonPressedCallback);
- button1.rise(buttonReleasedCallback);
- button1.mode(PullNone);
- button1.fall(NULL);
- button1.rise(NULL);
BLE &ble = BLE::Instance();
ble.init(bleInitComplete);
- //debug uart
- //device.baud(115200);
float bat_reading; //hold battery voltage reading (Vbg/Vcc)
my_analogin_init();//routes band-gap to analog input
@@ -400,59 +430,32 @@
while (ble.hasInitialized() == false) { /* spin loop */ }
//every X seconds, sends period update, up to 1800 (30 minutes)
- tic_periodic.attach(periodic_Callback, 1600);
- tic_clock_reset.attach(clock_reset_Callback, Periodicity);
-
- //how to generate random number using die tempearature
- uint32_t myTempRand;
- uint32_t * p_temp;
- //get temperature for random number
- //SVCALL(SD_TEMP_GET, myTempRand, sd_temp_get(p_temp));
- //sd_temp_get(& myTempRand);
+ Tic_Periodic.attach(periodic_Callback, Periodic_Update_Seconds); //send updated I/O every x seconds
+ Tic_Birthday.attach(clock_reset_Callback, Periodicity); //clock algorithm periodicity
- ble.getAddress(0,mac_reverse); //NOTE: last byte of MAC (as shown on phone app) is at mac[0], not mac[6];
-#if MyDebugEnb
- device.printf("mac = ");
- for (int i=0; i<6; i++) //prints out MAC address in reverse order; opps.
- {
- device.printf("%x:", mac_reverse[i]);
- }
- device.printf("\r\n");
-#endif
- while (true) {
- //seconds counts to 35 minutes: mySeconds=2142, then 63392 which should be 2450 but isn't.
- //00001000,01011110 -> 11110111,10100000
- uint16_t mySeconds =(uint16_t)(myTimer.read_ms()/1000); //problem: mySeconds is only 2 byte
- //xmit_cnt++;
- //if (mySeconds > 1800)
- //{
- // myTimer.reset();
- //clock_remainder = mySeconds - 1800;
- //}
- //mySeconds = mySeconds + clock_remainder; l3kjl3
-
- //reading the ADV value, only goes up to 0-255;
- //reading the uart: current time in seconds: -1782, goes negative.
- //need to be able to count 1800 seconds since that's the length of timer.
-
-#if MyDebugEnb
- device.printf("current time in seconds: %d \r\n", mySeconds);
-#endif
- //**** set which pin should be interrupt, set pullups ***
-
+ ble.getAddress(0,mac_reverse); //last byte of MAC (as shown on phone app) is at mac[0], not mac[6];
+ #if MyDebugEnb
+ device.printf("mac = ");
+ for (int i=0; i<6; i++) //prints out MAC address in reverse order; opps.
+ {
+ device.printf("%x:", mac_reverse[i]);
+ }
+ device.printf("\r\n");
+ #endif
+ while (true)
+ { //Main Loop
+
+ uint16_t seconds_Old =(uint16_t)(Tmr_From_Birthday.read_ms()/1000); // 0-1800 seconds (30 minutes)
+
+ #if MyDebugEnb
+ device.printf("current time in seconds: %d \r\n", seconds_Old);
+ #endif
+
//set both pins to pull-up, so they're not floating when we read state
button1.mode(PullUp);
button2.mode(PullUp);
- //wait_ms(300); //contact settle
-
-
- //AdvData[12] is automatically CR? why?
-
- //0x33 0x2E 0x33 0x32 0x13
- // 3 . 3 2 CR
-
//expect either button1 or button2 is grounded, b/c using SPDT reed switch
//the "common" pin on the reed switch should be on GND
uint8_t button1_state = button1.read();
@@ -460,12 +463,10 @@
//let's just update the pins on every wake. Insurance against const drain.
- //if state == 0, pin is grounded. Unset interrupt and float pin
- //set the other input
+ //if state == 0, pin is grounded. Unset interrupt and float pin, set the other pin for ISR
if ( (button1_state == 0) && (button2_state == 1) )
{
magnet_near = 1;
- //AdvData[4] = 0x11; //dont' set ADV data directly. Using json now, need spacing
//button1.disable_irq() //don't know if disables IRQ on port or pin
button1.fall(NULL); //disable interrupt
button1.rise(NULL); //disable interrupt
@@ -475,14 +476,13 @@
button2.fall(buttonReleasedCallback); //enable interrupt
button2.rise(buttonReleasedCallback); //enable interrupt
button2.mode(PullUp); //pull up on pin to get interrupt
-#if MyDebugEnb
- device.printf("=== button 1! %d seconds=== \r\n", mySeconds);
-#endif
- }
+ #if MyDebugEnb
+ device.printf("=== button 1! %d seconds=== \r\n", seconds_Old);
+ #endif
+ } //end if button2
else if ( (button1_state == 1) && (button2_state == 0) ) //assume other pin is open circuit
{
magnet_near = 0;
- //AdvData[4] = 0x22; //dont' set ADV data directly. Using json now, need spacing
//button1.disable_irq() //don't know if disables IRQ on port or pin
button1.fall(buttonReleasedCallback); //enable interrupt
button1.rise(buttonReleasedCallback); //enable interrupt
@@ -492,10 +492,10 @@
button2.fall(NULL); //disable interrupt
button2.rise(NULL); //disable interrupt
button2.mode(PullNone); //float pin to save battery
-#if MyDebugEnb
- device.printf("=== button 2! === %d seconds\r\n", mySeconds);
-#endif
- }
+ #if MyDebugEnb
+ device.printf("=== button 2! === %d seconds\r\n", seconds_Old);
+ #endif
+ } //end if button1
else //odd state, shouldn't happen, suck battery and pullup both pins
{
magnet_near = 2;
@@ -509,158 +509,143 @@
button2.fall(buttonReleasedCallback); //disable interrupt
button2.rise(buttonReleasedCallback); //disable interrupt
button2.mode(PullUp); //float pin to save battery
-#if MyDebugEnb
- device.printf("no buttons!! %d seconds\r\n", mySeconds);
-#endif
- }
+ #if MyDebugEnb
+ device.printf("no buttons!! %d seconds\r\n", seconds_Old);
+ #endif
+ } //end odd state
- if (flag_update_io) {
+ if (Flag_Update_IO) {
/* Do blocking calls or whatever hardware-specific action is
* necessary to poll the sensor. */
+ //call attach again on periodic update to reset ticker
+ //next periodic updates happens Perioidc_Update_Seconds after I/O events
+ Tic_Periodic.attach(periodic_Callback, Periodic_Update_Seconds);
Xmit_Cnt++; //increment transmit counter when updating I/O
-
-
- //read battery voltage
- //analog reading consumes 940uA if not disabled
- bat_reading = (float)my_analogin_read_u16();
-
+ //read and convert battery voltage
+ bat_reading = (float)read_bat_volt();
bat_reading = (bat_reading * 3.6) / 1024.0;
-#if MyDebugEnb
+ #if MyDebugEnb
device.printf("bat reading: %f \r\n", bat_reading);
-#endif
-
- //memset(&buffer[0], 0, sizeof(buffer)); //clear out buffer
- //sprintf (buffer, "%f.2", bat_reading); //don't know what i'm doing
- //sprintf (buffer, "%.2f", bat_reading);
- //AdvData[8] = buffer[0]; //"3"=0x33
- //AdvData[9] = buffer[1]; //"."=0x2E
- //AdvData[10] = buffer[2];//"3"=0x33
- //AdvData[11] = buffer[3];//"2"=0x32
+ #endif
+ //write battery voltage
+ uint8_t total_chars;
+ memset(&bat_volt_char[0], 0, sizeof(bat_volt_char)); //clear out buffer
+ //convert battery voltage float value to string reprsentation to 2 decimal places, and save the size of string.
+ total_chars = sprintf (bat_volt_char, "%.2f", bat_reading);
- //try this
- //https://developer.mbed.org/users/mbed_official/code/mbed-src/file/cb4253f91ada/targets/hal/TARGET_NORDIC/TARGET_NRF51822/analogin_api.c
+
+ //read and convert analog voltage. Comment out this section if note needed, saves some battery
NRF_ADC->TASKS_STOP = 1;
float analogreading;
- analogreading = (float)my_analog_pin_read();
+ analogreading = (float)read_ADC_pin();
analogreading = (analogreading * 3.6) / 1024.0;
#if MyDebugEnb
device.printf("separate analog reading: %.02f \r\n", analogreading);
#endif
- //disable ADC
+ //disable ADC to save power
NRF_ADC->TASKS_STOP = 1;
NRF_ADC->ENABLE = ADC_ENABLE_ENABLE_Disabled; //disable to shutdown ADC & lower bat consumption
-
- //***********************************
- //form JSON string in ADV_DATA
- //1) volts starts at AdvData[8]
-
+ #if MyDebugEnb
+ device.printf("char buff: %c%c%c%c \r\n", bat_volt_char[0], bat_volt_char[1], bat_volt_char[2], bat_volt_char[3]);
+ device.printf("num chars: %d \r\n", total_chars);
+ #endif
- //write battery voltage
- uint8_t total_chars;
- memset(&bat_volt_char[0], 0, sizeof(bat_volt_char)); //clear out buffer
- total_chars = sprintf (bat_volt_char, "%.2f", bat_reading); //returns total number of characters
-
-#if MyDebugEnb
- device.printf("char buff: %c%c%c%c \r\n", bat_volt_char[0], bat_volt_char[1], bat_volt_char[2], bat_volt_char[3]);
- device.printf("num chars: %d \r\n", total_chars);
-#endif
+ //Generate "First Section" for ADV_Data so gateway will recognize our advertisement pattern
+ hash_first_section(Adv_First_Section, mac_reverse, bat_volt_char);
-
- //memset(&Adv_First_Section[0], 0, sizeof(Adv_First_Section)); //not needed to reset
- hash_first_section(Adv_First_Section, mac_reverse, bat_volt_char);
-
-
-
- //------------------------------------------------------------------
- //start writing out ADVData array
- //------------------------------------------------------------------
-
+ /* ****************************************
+ * start writing out ADVData array
+ * todo: this is easy to write but hard to read. Maybe make it easy to read and hard to write?
+ ******************************************/
memset(&AdvData[0], 0, sizeof(AdvData));
uint8_t JSON_loc=0; //AdvData[0]
- AdvData[0] = Adv_First_Section[0]; //AdvData[0] = manf ID 01
- JSON_loc++; //1
- AdvData[1] = Adv_First_Section[1]; //AdvData[1] = manf ID 02
- JSON_loc++; //2
- AdvData[2] = Adv_First_Section[2]; //AdvData[2] = reserved
- JSON_loc++; //3...
- AdvData[3] = Adv_First_Section[3]; //AdvData[3] = reserved
- JSON_loc++;
- AdvData[4] = Adv_First_Section[4]; //AdvData[4] = voltage 01
+ AdvData[0] = Adv_First_Section[0]; //"our device" flag, MAC[3]
+ JSON_loc++; //JSON_loc == 1
+ AdvData[1] = Adv_First_Section[1]; //"out device" flag, MAC[2]...
+ JSON_loc++; //JSON_loc == 2
+ AdvData[2] = Adv_First_Section[2];
+ JSON_loc++; //JSON_loc == 3
+ AdvData[3] = Adv_First_Section[3];
+ JSON_loc++; //JSON_loc == 4
+ AdvData[4] = Adv_First_Section[4];
+ JSON_loc++; //JSON_loc == 5
+ AdvData[5] = Adv_First_Section[5];
+ JSON_loc++; //JSON_loc == 6
+ AdvData[6] = Adv_First_Section[6];
JSON_loc++;
- AdvData[5] = Adv_First_Section[5]; //AdvData[5] = voltage 02
- JSON_loc++;
- AdvData[6] = Adv_First_Section[6]; //AdvData[6] = voltage 03
+ AdvData[7] = Adv_First_Section[7];
JSON_loc++;
- AdvData[7] = Adv_First_Section[7]; //AdvData[7] = voltage 04
+ AdvData[8] = Adv_First_Section[8];
JSON_loc++;
- AdvData[8] = Adv_First_Section[8]; //AdvData[8] = reserved
- JSON_loc++;
- AdvData[9] = Adv_First_Section[9]; //AdvData[9] = reserved
+ AdvData[9] = Adv_First_Section[9];
JSON_loc++;
-#if MyDebugEnb
-
- device.printf("ADV first 10 array: ");
- for (int i=0; i<10; i++)
- {
- device.printf("%x ", AdvData[i]);
- }
- device.printf("\r\n");
-#endif
+ #if MyDebugEnb
+ device.printf("ADV first 10 array: ");
+ for (int i=0; i<10; i++)
+ {
+ device.printf("%x ", AdvData[i]);
+ }
+ device.printf("\r\n");
+ #endif
JSON_loc = 10;
- //start of encrypted data
- //AdvData[10]
- AdvData[10] = mySeconds & 0xFF; //reserved for timer
+ //Start of encrypted user data
+
+ //[10] and [11] hold 2 bytes for how many seconds since birthday, little endian
+ AdvData[10] = seconds_Old & 0xFF;
JSON_loc++;
- AdvData[11] = (mySeconds >> 8) & 0xFF; //reserved for timer
+ AdvData[11] = (seconds_Old >> 8) & 0xFF;
JSON_loc++;
+
AdvData[12] = Xmit_Cnt;
JSON_loc++;
+
//start of jason data
+ //"mag":
JSON_loc = 13;
- AdvData[JSON_loc] = 0x22; //" start mag pos=13
+ AdvData[JSON_loc] = 0x22; //ADV_Data[13] = "
JSON_loc++; //14
- AdvData[JSON_loc] = 0x6d; //m, pos=14
+ AdvData[JSON_loc] = 0x6d; //ADV_Data[14] = m
JSON_loc++; //15
- AdvData[JSON_loc] = 0x61; //a, pos=15
+ AdvData[JSON_loc] = 0x61; //ADV_Data[15] = a
JSON_loc++; //16
- AdvData[JSON_loc] = 0x67; //g, pos=16
+ AdvData[JSON_loc] = 0x67; //ADV_Data[16] = g
JSON_loc++; //17
- if (flag_periodic_call)
+ //for periodic calls, we want to add an extra mqtt level "p", using "/p"
+ //to delineate between MQTT publishes from real world I/O interrupts vs timer interrupts
+ if (Flag_Periodic_Call)
{
- //AdvData[JSON_loc] = 0x2f; // "/"
- //JSON_loc++;
- AdvData[JSON_loc] = 0x2f; // "/" pos=17
- JSON_loc++;//pos=18
- AdvData[JSON_loc] = 0x70; // "p" poes=18
- JSON_loc++;//pos=19
- }//end if period call
+ AdvData[JSON_loc] = 0x2f; // ADV_Data[17] = /
+ JSON_loc++; //18
+ AdvData[JSON_loc] = 0x70; // ADV_Data[18] =p
+ JSON_loc++; //19
+ }
- AdvData[JSON_loc] = 0x22; //" pos = 17 or 19
+ AdvData[JSON_loc] = 0x22; //ADV_Data[17 or 19] = "
JSON_loc++; //20
- AdvData[JSON_loc] = 0x3a; //: pos = 18 or 20
- JSON_loc++; //22
+ AdvData[JSON_loc] = 0x3a; //ADV_Data[18 or 20] = :
+ JSON_loc++; //21
- //prep magnet location (1 or 0) for char[]
+ //convert magnet variable to string, for magnet sensor, this is easy
+ //since we only have 1 or 0, but this also works for analog values
memset(&buffer[0], 0, sizeof(buffer)); //clear out buffer
- //magnet_near is an integer
total_chars = sprintf (buffer, "%d", magnet_near); //returns total number of characters, which is 1 character.
for (int i=0; i < total_chars; i++)
{
@@ -668,79 +653,53 @@
JSON_loc++; //23
} //JSON_loc left at location of next character
- //MUST null terminate for JSON to read correctly, else get intermittent JSON parse errors at gateway
- //happens when string is shorter than last string, get trash left overs
- //not really needed after clearning AdvData at start.
-
-
- //AdvData[JSON_loc] = 0x0; //null terminate here
+
+ //AdvData[JSON_loc] = 0x0; //since AdvData was cleared to start with, we don't need to null term
ApplicationData_t appData;
setupApplicationData(appData);
-
+ /*********************
+ * start encrypting last 16 bytes of ADV_Data
+ *********************/
for (int i=0; i<16; i++)
{
src_buf[i] = AdvData[i+10]; //start of encrypted section is at AdvData[10]
}
-
- //nrf_ecb_set_key(key_buf);
nrf_ecb_init();
nrf_ecb_set_key(key_buf);
bool successful_ecb = nrf_ecb_crypt(des_buf, src_buf);
-#if MyDebugEnb
- device.printf("success ecb = %d \r\n", successful_ecb);
- device.printf("src_buf: %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x \r\n", src_buf[0], src_buf[1], src_buf[2], src_buf[3], src_buf[4], src_buf[5], src_buf[6], src_buf[7], src_buf[8], src_buf[9], src_buf[10], src_buf[11], src_buf[12], src_buf[13], src_buf[14], src_buf[15]);
- device.printf("des_buf: %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x \r\n", des_buf[0], des_buf[1], des_buf[2], des_buf[3], des_buf[4], des_buf[5], des_buf[6], des_buf[7], des_buf[8], des_buf[9], des_buf[10], des_buf[11], des_buf[12], des_buf[13], des_buf[14], des_buf[15]);
-#endif
- for (int i=0; i<16; i++)
+ #if MyDebugEnb
+ device.printf("success ecb = %d \r\n", successful_ecb);
+ device.printf("src_buf: %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x \r\n", src_buf[0], src_buf[1], src_buf[2], src_buf[3], src_buf[4], src_buf[5], src_buf[6], src_buf[7], src_buf[8], src_buf[9], src_buf[10], src_buf[11], src_buf[12], src_buf[13], src_buf[14], src_buf[15]);
+ device.printf("des_buf: %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x \r\n", des_buf[0], des_buf[1], des_buf[2], des_buf[3], des_buf[4], des_buf[5], des_buf[6], des_buf[7], des_buf[8], des_buf[9], des_buf[10], des_buf[11], des_buf[12], des_buf[13], des_buf[14], des_buf[15]);
+ #endif
+ for (int i=0; i<16; i++) //replace last 16 bytes with encrypted 16 bytes
{
AdvData[i+10] = des_buf[i];
}
+ //set payload for advertisement to our custom manufactured data. First 5 bytes is BLE standard, last 26 bytes is our array
//ble.gap().updateAdvertisingPayload(GapAdvertisingData::MANUFACTURER_SPECIFIC_DATA, (uint8_t *) &appData, sizeof(ApplicationData_t));
ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::MANUFACTURER_SPECIFIC_DATA, AdvData, sizeof(AdvData));
- flag_update_io = false;
- flag_periodic_call = false;
+ Flag_Update_IO = false;
+ Flag_Periodic_Call = false;
- //GAP::AddressType_t *myType;
- //GAP::Address_t myAddress
- //ble_error_t getAddress(Gap::AddressType_t *typeP, Gap::Address_t address)
- //ble.gap().getAddress(myType, myAddress);
- //ble.gap().getAddress(Gap::AddressType_t *typeP, Gap::Address_t address);
-
-
-
ble.gap().startAdvertising();
- tic_adv.attach(stop_adv_Callback, 2); /* trigger turn off advertisement after X seconds */
-
+ Tic_Stop_Adv.attach(stop_adv_Callback, 3); /* trigger turn off advertisement after X seconds */
- }//end flag_update_io
+ }//end Flag_Update_IO
- /*
- if (flag_set_debounce_tic == true)
- {
- tic_debounce.attach();
- //flag_set_debounce_tic = false;
-
- }
- */
-
- //if (trigger_Detach_ADV_Tick == false)
- //{
- //}
- if (flag_detach_adv_tic == true) //Stop Advertising
+ if (Flag_Detach_Adv_Tic == true) //ticker callback flag to stop advertising
{
ble.gap().stopAdvertising(); //may be safer to execute BLE operations in main
- tic_adv.detach();
- flag_detach_adv_tic = false;
+ Tic_Stop_Adv.detach();
+ Flag_Detach_Adv_Tic = false;
}
- //device.printf("Input Voltage: %f\n\r",bat_reading);
+
- ble.waitForEvent(); //sleeps until interrupt
-
-
+ ble.waitForEvent(); //sleeps until interrupt form ticker or I/O
}//end forever while
}//end main