ENEL400
Wireless interface using LoRa technology
Dependencies: AlohaTransceiver RingBuffer SX1276Lib SerialInterfaceProtocol mbed L3PDU
Diff: main.cpp
- Revision:
- 23:378bd4d025d0
- Parent:
- 21:0f6635739f66
- Child:
- 24:2136cf94fedb
diff -r b7471336cffc -r 378bd4d025d0 main.cpp
--- a/main.cpp Wed Aug 24 10:46:58 2016 +0000
+++ b/main.cpp Wed Aug 31 03:38:21 2016 +0000
@@ -394,7 +394,7 @@
}
// decode the user message
- uint8_t sensor_type = payload[0];
+ uint8_t source_type = payload[0];
uint8_t node_id = payload[1];
// create a command packet
@@ -413,7 +413,7 @@
packet.setCommand(0x0);
// store sensor type in data block 0
- packet.setData(0, sensor_type);
+ packet.setData(0, source_type);
// generate crc
packet.generateCrc();
@@ -435,6 +435,7 @@
{
// decode user message
uint8_t node_id = payload[0];
+ uint8_t source_type = 0x2; // query for service quality
// create a command packet
ControlPacket packet;
@@ -448,8 +449,11 @@
// set destination id as node id
packet.setDestinationID(node_id);
- // set command as query (0x3)
- packet.setCommand(0x3);
+ // set command as query (treat it similar to sensor)
+ packet.setCommand(0x0);
+
+ // store sensor type in data block 0
+ packet.setData(0, source_type);
// generate crc
packet.generateCrc();
@@ -489,76 +493,75 @@
uint8_t command = controlPacket.getCommand();
switch(command)
{
- case 0x2: // received response for service quality
- {
- uint8_t payload[6];
-
- // first byte is the snr of foreign host
- payload[0] = controlPacket.getData(0);
-
- // second and third byte are the rssi of foreign host
- payload[1] = controlPacket.getData(1);
- payload[2] = controlPacket.getData(2);
-
- // fourth byte is the snr of local host
- payload[3] = (uint8_t) aloha.getSnr();
-
- // fifth and sixth byte are the rssi of local host
- int_string_16 rssi;
- rssi.int16 = aloha.getRssi();
-
- payload[4] = rssi.bytes[0];
- payload[5] = rssi.bytes[1];
-
- // make response
- SIP.respond(0xf1, payload, 6);
-
- break;
- }
- case 0x3: // request for service quality
+ case 0x0: // query
{
- int_string_16 rssi;
- uint8_t snr;
-
- // get rssi and snr
- rssi.int16 = aloha.getRssi();
- snr = aloha.getSnr();
-
- // create response
- ControlPacket response;
-
- // set layer 3 sequence id
- response.setSequenceID(0x0);
-
- // set source id
- response.setSourceID(aloha.getDeviceID());
-
- // set destination id
- response.setDestinationID(src_addr);
-
- // set command as respond
- response.setCommand(0x2);
-
- // set payload
- response.setData(0, (uint8_t) snr); // store SNR
- response.setData(1, (uint8_t) rssi.bytes[0]); // store higher bits of RSSI
- response.setData(2, (uint8_t) rssi.bytes[1]); // store lower bits of RSSI
-
- // generate crc
- response.generateCrc();
-
- // create buffer for transmission
- uint8_t buffer[8];
- memset(buffer, 0x0, sizeof(buffer));
-
- // copy bytes into buffer
- response.serialize(buffer);
-
- // send to aloha transceiver
- aloha.send(buffer, 8, src_addr);
+ // execute query
+ uint8_t sensor_type = controlPacket.getData(0);
+ switch (sensor_type)
+ {
+ case 0x0: // temperature: NULL
+ {
+ break;
+ }
+ case 0x1: // door: NULL
+ {
+ break;
+ }
+ case 0x2: // service quality
+ {
+ int_string_16 rssi;
+ uint8_t snr;
+
+ // get rssi and snr
+ rssi.int16 = aloha.getRssi();
+ snr = aloha.getSnr();
+
+ // create a response
+ DataBlockPacket response;
+
+ // set sequence id (the sequence id is configured as incoming sequence id + 1)
+ response.setSequenceID(controlPacket.getSequenceID() + 1);
+
+ // set source id (the source id is the current device ID)
+ response.setSourceID(aloha.getDeviceID());
+
+ // set destination id (the destination ID is the original source address)
+ response.setDestinationID(controlPacket.getSourceID());
+
+ // set source type (service quality)
+ response.setSourceType(0x2);
+
+ // set payload type (byte)
+ response.setPayloadType(0x0);
+
+ // set payload
+ response.setData(0, (uint8_t) snr); // store SNR
+ response.setData(1, (uint8_t) rssi.bytes[0]); // store higher bits of RSSI
+ response.setData(2, (uint8_t) rssi.bytes[1]); // store lower bits of RSSI
+
+ // calculate crc
+ response.generateCrc();
+
+ // serialize and send it
+ uint8_t buffer[8];
+ memset(buffer, 0x0, sizeof(buffer));
+
+ // copy bytes into buffer
+ response.serialize(buffer);
+
+ // send to aloha transceiver
+ aloha.send(buffer, 8, src_addr);
+
+ break;
+ }
+
+ default:
+ break;
+ }
break;
}
+
default:
break;
}
@@ -570,18 +573,18 @@
{
DataBlockPacket dataBlockPacket(payload);
- uint8_t sensor_type = dataBlockPacket.getSourceType();
- switch(sensor_type)
+ uint8_t source_type = dataBlockPacket.getSourceType();
+ switch(source_type)
{
case 0x0: // temperature sensor
{
uint8_t payload[3];
// copy sensor type
- payload[0] = 0x00; // assume 0x00 is temperature sensor
+ payload[0] = 0x0; // assume 0x00 is temperature sensor
// copy sensor data
- payload[1] = src_addr; // assume we only use one byte
+ payload[1] = dataBlockPacket.getSourceID(); // assume we only use one byte
// copy address of source node
payload[2] = dataBlockPacket.getData(0);
@@ -596,10 +599,10 @@
uint8_t payload[3];
// copy sensor type
- payload[0] = 0x01;
+ payload[0] = 0x1;
// copy sensor data
- payload[1] = src_addr;
+ payload[1] = dataBlockPacket.getSourceID();
// copy address of source node
payload[2] = dataBlockPacket.getData(0);
@@ -609,11 +612,43 @@
break;
}
+ case 0x2: // service quality
+ {
+ uint8_t payload[8];
+
+ // copy source type
+ payload[0] = 0x2;
+
+ // copy sensor data
+ payload[1] = dataBlockPacket.getSourceID();
+
+ // first byte is the snr of foreign host
+ payload[2] = dataBlockPacket.getData(0);
+
+ // second and third byte are the rssi of foreign host
+ payload[3] = dataBlockPacket.getData(1);
+ payload[4] = dataBlockPacket.getData(2);
+
+ // fourth byte is the snr of local host
+ payload[5] = (uint8_t) aloha.getSnr();
+
+ // fifth and sixth byte are the rssi of local host
+ int_string_16 rssi;
+ rssi.int16 = aloha.getRssi();
+
+ payload[6] = rssi.bytes[0];
+ payload[7] = rssi.bytes[1];
+
+ // make response
+ SIP.respond(0xf0, payload, 8);
+
+ break;
+ }
+
default:
break;
}
- // do something
break;
}
default: