GroveStreams / Mbed 2 deprecated GroveStreams-Temp

An example that demonstrates uploading data from the DISCO-F746 (STM32F746) board to GroveStreams.com, an IoT analytics platform. Also demonstrations downloading commands, re-establishing dropped ethernet connections, accurate polling frequencies, and tracing to the LCD.

Dependencies:   BSP_DISCO_F746NG F7_Ethernet GroveStreams LCD_DISCO_F746NG LcdDiscoF746NgTracer MbedJSONValue NetworkAPI mbed-rtos mbed

main.cpp@1:83187cd9f34d, 2017-01-05 (annotated)

Committer:
mmills
Date:
Thu Jan 05 18:48:17 2017 +0000
Revision:
1:83187cd9f34d
Parent:
0:04ac35f1846e 
An example of pushing data into GroveStreams.com. The example is for the STM32F746 and demonstrates:; * Polling; * Tracing to the LCD; * Uploading Samples; * Downloading Commands; * Handling dropped Ethernet connections

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mmills 0:04ac35f1846e 1 /*
mmills 0:04ac35f1846e 2
mmills 0:04ac35f1846e 3 STM32F746 GroveStreams Stream Feed via Ethernet
mmills 0:04ac35f1846e 4
mmills 1:83187cd9f34d 5 This GroveStreams example is designed for the STM32F746.
mmills 0:04ac35f1846e 6 A full "how to" guide for this sketh can be found at https://www.grovestreams.com/developers/getting_started_stm32F746.html
mmills 0:04ac35f1846e 7 This example:
mmills 0:04ac35f1846e 8 * Demonstrates uploading data to GroveStreams while downloading commands.
mmills 0:04ac35f1846e 9 * Demonstrates the GroveStreams API: https://www.grovestreams.com/developers/api.html
mmills 0:04ac35f1846e 10 * Passing in a custom name for a new component
mmills 0:04ac35f1846e 11 * Passing in a component template ID to be used for new component definitions
mmills 0:04ac35f1846e 12 * Downloading a couple of commands during the sample upload and implements them.
mmills 0:04ac35f1846e 13 * Demonstrates an accurate way to poll and send samples periodically
mmills 0:04ac35f1846e 14 * Demonstrates send retries and Internet Connection Reset logic to ensure the
mmills 0:04ac35f1846e 15 STM32 stays connected and can regain connectivity after a network outage.
mmills 0:04ac35f1846e 16 * Printing verbose trace statements to the LCD (optional)
mmills 0:04ac35f1846e 17 The STM32 uses DHCP and DNS for a simpler network setup.
mmills 0:04ac35f1846e 18
mmills 0:04ac35f1846e 19 License:
mmills 0:04ac35f1846e 20 Copyright (C) 2017 GroveStreams LLC.
mmills 0:04ac35f1846e 21 Licensed under the Apache License, Version 2.0 (the "License");
mmills 0:04ac35f1846e 22 you may not use this file except in compliance with the License.
mmills 0:04ac35f1846e 23 You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0
mmills 0:04ac35f1846e 24
mmills 0:04ac35f1846e 25 Unless required by applicable law or agreed to in writing, software
mmills 0:04ac35f1846e 26 distributed under the License is distributed on an "AS IS" BASIS,
mmills 0:04ac35f1846e 27 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mmills 0:04ac35f1846e 28 See the License for the specific language governing permissions and
mmills 0:04ac35f1846e 29 limitations under the License.
mmills 0:04ac35f1846e 30 */
mmills 0:04ac35f1846e 31
mmills 0:04ac35f1846e 32 #if !FEATURE_LWIP
mmills 0:04ac35f1846e 33 #error [NOT_SUPPORTED] LWIP not supported for this target
mmills 0:04ac35f1846e 34 #endif
mmills 0:04ac35f1846e 35
mmills 0:04ac35f1846e 36 #include "mbed.h"
mmills 0:04ac35f1846e 37 #include "LcdDiscoF746NgTracer.h"
mmills 0:04ac35f1846e 38 #include "GroveStreams.h"
mmills 0:04ac35f1846e 39 #include "MbedJSONValue.h"
mmills 0:04ac35f1846e 40
mmills 0:04ac35f1846e 41 // GroveStreams Settings
mmills 0:04ac35f1846e 42 const char gsApiKey[] = "YOUR_SECRET_API_KEY_HERE"; //Change This!!!
mmills 0:04ac35f1846e 43 const char gsCompName[] = "STM32F746+Discovery"; //Optionally change. Set this to give your component a name when it initially registers. Encode special chars such as spaces.
mmills 0:04ac35f1846e 44
mmills 0:04ac35f1846e 45 const char gsCompTmplId[] = ""; //Optional. Tells GS what template to use when the feed initially arrives and a new component needs to be created.
mmills 0:04ac35f1846e 46
mmills 0:04ac35f1846e 47 //GroveStreams Stream IDs. Stream IDs tell GroveStreams which component streams the values will be assigned to.
mmills 0:04ac35f1846e 48 //Don't change these unless you edit your GroveStreams component definition and change the stream IDs to match these.
mmills 0:04ac35f1846e 49 const char gsStreamId1[] = "voltage";
mmills 0:04ac35f1846e 50 const char gsStreamId2[] = "temperature";
mmills 0:04ac35f1846e 51
mmills 0:04ac35f1846e 52 // Other Settings
mmills 0:04ac35f1846e 53 int updateFrequency = 20; // Update frequency in seconds. Change this to change your sample frequency.
mmills 0:04ac35f1846e 54
mmills 0:04ac35f1846e 55 AnalogIn adc_temp(ADC_TEMP);
mmills 0:04ac35f1846e 56 AnalogIn adc_vref(ADC_VREF);
mmills 0:04ac35f1846e 57 DigitalOut myled(LED1);
mmills 0:04ac35f1846e 58
mmills 0:04ac35f1846e 59 int main()
mmills 0:04ac35f1846e 60 {
mmills 0:04ac35f1846e 61 //Create Lcd class for verbose tracing
mmills 0:04ac35f1846e 62 LcdDiscoF746NgTracer lcd;
mmills 0:04ac35f1846e 63
mmills 0:04ac35f1846e 64 //lastSuccessfulUploadTime is used for upload frequency.
mmills 0:04ac35f1846e 65 time_t lastSuccessfulUploadTime = 0;
mmills 0:04ac35f1846e 66
mmills 0:04ac35f1846e 67 lcd.printf("Starting...");
mmills 0:04ac35f1846e 68
mmills 0:04ac35f1846e 69 GroveStreams groveStreams(gsApiKey, &lcd);
mmills 0:04ac35f1846e 70
mmills 0:04ac35f1846e 71 const char* myMac = groveStreams.getMACAddress();
mmills 0:04ac35f1846e 72
mmills 0:04ac35f1846e 73 while (true) {
mmills 0:04ac35f1846e 74 // Update sensor data to GroveStreams
mmills 0:04ac35f1846e 75 time_t seconds = time(NULL);
mmills 0:04ac35f1846e 76
mmills 0:04ac35f1846e 77 if(seconds - lastSuccessfulUploadTime > updateFrequency) {
mmills 0:04ac35f1846e 78 lcd.clear();
mmills 0:04ac35f1846e 79
mmills 0:04ac35f1846e 80 lcd.printf("Getting Samples...");
mmills 0:04ac35f1846e 81
mmills 0:04ac35f1846e 82 //Assemble the samples into URL parameters which are seperated with the "&" character
mmills 0:04ac35f1846e 83 // Example: &s1=6.2&s2=78.231
mmills 0:04ac35f1846e 84 int temperature = adc_temp.read() * 100.0f;
mmills 0:04ac35f1846e 85 int voltage = adc_vref.read() * 100.0f;
mmills 0:04ac35f1846e 86 char samples[64] = {0};
mmills 0:04ac35f1846e 87 sprintf(samples, "&%s=%d&%s=%d", gsStreamId1, voltage, gsStreamId2, temperature);
mmills 0:04ac35f1846e 88
mmills 0:04ac35f1846e 89 //Append on command requests (request stream values)
mmills 0:04ac35f1846e 90 //This will indicate to GroveStreams to return the last value
mmills 0:04ac35f1846e 91 // of each request stream during the sample upload
mmills 0:04ac35f1846e 92 strcat(samples, "&rsid=freq&rsid=led");
mmills 0:04ac35f1846e 93
mmills 0:04ac35f1846e 94 char resultBuffer[700]= {0};
mmills 0:04ac35f1846e 95
mmills 0:04ac35f1846e 96 //Sending Samples (and returning current command stream values)
mmills 0:04ac35f1846e 97 time_t connectAttemptTime = time(NULL);
mmills 0:04ac35f1846e 98 int sendResult = groveStreams.send(myMac, samples, gsCompName, gsCompTmplId, resultBuffer, sizeof resultBuffer);
mmills 0:04ac35f1846e 99
mmills 0:04ac35f1846e 100 if (sendResult == 0) {
mmills 0:04ac35f1846e 101 lcd.printf("Send Successful");
mmills 0:04ac35f1846e 102 lastSuccessfulUploadTime = connectAttemptTime;
mmills 0:04ac35f1846e 103
mmills 0:04ac35f1846e 104 //Handle command streams
mmills 0:04ac35f1846e 105 if (strlen(resultBuffer) > 0 && resultBuffer[0] == '{') {
mmills 0:04ac35f1846e 106 MbedJSONValue mbedJson;
mmills 0:04ac35f1846e 107 parse(mbedJson, resultBuffer);
mmills 0:04ac35f1846e 108
mmills 0:04ac35f1846e 109 if (mbedJson.hasMember("freq") && mbedJson["freq"].get<int>() >= 10) {
mmills 0:04ac35f1846e 110 //Change the update frequency
mmills 0:04ac35f1846e 111 updateFrequency = mbedJson["freq"].get<int>();
mmills 0:04ac35f1846e 112 lcd.printf("updateFrequency: %d", updateFrequency);
mmills 0:04ac35f1846e 113 }
mmills 0:04ac35f1846e 114 if (mbedJson.hasMember("led")) {
mmills 0:04ac35f1846e 115 //Change LED
mmills 0:04ac35f1846e 116 myled = mbedJson["led"].get<bool>() ? 1 : 0;
mmills 0:04ac35f1846e 117 lcd.printf("LED: %s", mbedJson["led"].get<bool>() ? "On" : "Off");
mmills 0:04ac35f1846e 118 }
mmills 0:04ac35f1846e 119 }
mmills 0:04ac35f1846e 120 }
mmills 0:04ac35f1846e 121 }
mmills 0:04ac35f1846e 122 }
mmills 0:04ac35f1846e 123 }
mmills 0:04ac35f1846e 124