Enable Remote Calibration

lib/MHZ19C/MHZ19C.cpp

@@ -53,7 +53,7 @@ void MHZ19C::calibrate(void) {
   digitalWrite(calpin, LOW);
   delay(7500);
   digitalWrite(calpin, HIGH);
-  pinMode(PIN_PB4, INPUT_PULLUP);
+  pinMode(calpin, INPUT_PULLUP);
 }
 
 uint8_t MHZ19C::getSensorData(char * payload, uint8_t startbyte) {

lib/SENSAIRS8/SENSAIRS8.cpp

@@ -49,6 +49,22 @@ uint8_t SENSAIRS8::getSensorData(char *payload, uint8_t startbyte) {
   return startbyte+2;
 }
 
+void SENSAIRS8::calibrate(void) {
+  pinMode(calpin, OUTPUT);
+  digitalWrite(calpin, LOW);
+  delay(6000);
+  digitalWrite(calpin, HIGH);
+  pinMode(calpin, INPUT_PULLUP);
+}
+
+void SENSAIRS8::initialize(void) {
+  // Disable Auto Background Calibration
+  uint8_t _cmd[8] = {0xFE, 0x06, 0x00, 0x01F, 0x00, 0x00, 0xAC, 0x03};
+  while (Serial.available() > 0) Serial.read();
+    Serial.write(_cmd, 8);
+    Serial.flush();
+}
+
 // Read a Sensor Response
 uint8_t SENSAIRS8::read() {
     // Number of returned Bytes

lib/SENSAIRS8/SENSAIRS8.h

@@ -35,6 +35,7 @@
 class SENSAIRS8 : public AttSensor {
   private:
     uint8_t buffer[SER_BUF_LEN];
+    pin_size_t calpin = PIN_PB4; // PB4 is the Calibration Pin on the Addon PCB
 
     uint8_t read();
     void zeroBuffer(void);
@@ -43,8 +44,8 @@ class SENSAIRS8 : public AttSensor {
   public:
     SENSAIRS8(void);
     uint8_t getSensorData(char *payload, uint8_t startbyte);
-    void calibrate(void) {};
-    void initialize(void) {};
+    void calibrate(void);
+    void initialize(void);
     uint8_t numBytes(void) {return 2;};
 };
 

src/main.cpp

@@ -157,6 +157,15 @@ void onEvent(ev_t ev) {
       // Check for Downlink
       DEBUG_PRINTLN("LoRa Packet Sent");
       WS2812B_BLINK(1,0,127,0,1000);
+      if ((int)LMIC.dataLen > 0) {
+        // Check for Downlinks
+        // Function based in Ports:
+        // Port 1
+        //   Set Sending Interval
+        // Port 2
+        //   Do Calibration
+        switch((uint8_t)LMIC.frame[LMIC.dataBeg-1]) {
+          case 1:
             if ((int)LMIC.dataLen == 2) {
               // We got a Packet with the right size - lets assemble it into a uint16_t
               DEBUG_PRINTLN("Received Downlink")
@@ -167,6 +176,14 @@ void onEvent(ev_t ev) {
               EEPROM.put(ADDR_SLP, tmpslp);
               WS2812B_BLINK(1,0,0,127,250);
             }
+            break;
+          case 2:
+            for (uint8_t i=0; i<NUM_SENSORS; i++)
+              sensors[i]->calibrate();
+            BLINK_LED(3);
+            break;
+        }
+      }
 
       // Got to sleep for specified Time
       DEBUG_PRINTLN("Going to Sleep");