wireless temperature sensor

Posted on Feb 5, 2014

Here`s the Arduino code for reading incoming packets from the XBee and displaying the received analog sample on the LED display. Parsing an XBee packet is quite complex, unfortunately. But after studying the documentation for a while, it isn`t that hard. #define NUM_DIGITAL_SAMPLES 12 #define NUM_ANALOG_SAMPLES 4 int groundPins[7] = {8, 2, 3, 4, 5

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, 9, 7}; int digitPins[2] = {11, 10}; int ON = HIGH; int OFF = LOW; int number[10][7]; int digit[2]; int TOP = 0; int UPPER_L = 1; int LOWER_L = 2; int BOTTOM = 3; int LOWER_R = 4; int UPPER_R = 5; int MIDDLE = 6; int index; int n = 0; int packet[32]; int digitalSamples[NUM_DIGITAL_SAMPLES]; int analogSamples[NUM_ANALOG_SAMPLES]; void setup() { Serial. begin(9600); for(int i=0;i<7;i+) { pinMode(groundPins[i], OUTPUT); } for(int i=0;i<2;i+) { pinMode(digitPins[i], OUTPUT); } initNumber(); setDigit(n); } void loop() { readPacket(); drawDisplay(); } void readPacket() { if (Serial. available() > 0) { int b = Serial. read(); if (b = 0x7E) { packet[0] = b; packet[1] = readByte(); packet[2] = readByte(); int dataLength = (packet[1] << 8) | packet[2]; for(int i=1;i<=dataLength;i+) { packet[2+i] = readByte(); } int apiID = packet[3]; packet[3+dataLength] = readByte(); // checksum printPacket(dataLength+4); if (apiID = 0x92) { int analogSampleIndex = 19; int digitalChannelMask = (packet[16] << 8) | packet[17]; if (digitalChannelMask > 0) { int d = (packet[19] << 8) | packet[20]; for(int i=0;i < NUM_DIGITAL_SAMPLES;i+) { digitalSamples[i] = (d >> i) & 1); } analogSampleIndex = 21; } int analogChannelMask = packet[18]; for(int i=0;i<4;i+) { if (analogChannelMask >> i) & 1) { analogSamples[i] = (packet[analogSampleIndex] << 8) | packet[analogSampleIndex+1]; analogSampleIndex += 2; } else { analogSamples[i] = -1; } } } } int reading =...

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