README.md

@@ -20,9 +20,9 @@ Das sind die verwendeten Libraries [1]:
 | --- | -----  | ----------- |
 | https://github.com/mcci-catena/Adafruit_BME280_Library.git  | 3dafbe1 | Wed, 13 Dec 2017 13:56:30 -0500  |
 | https://github.com/mcci-catena/Adafruit_Sensor.git  | f2af6f4 | Tue, 1 Sep 2015 15:57:59 +0200  |
-| https://github.com/mcci-catena/arduino-lmic.git  | 9191f0c | Tue, 30 Jun 2020 09:56:19 -0400  |
+| https://github.com/mcci-catena/arduino-lmic.git  | 6fe04ec | Tue, 12 May 2020 09:16:47 -0400  |
 | https://github.com/mcci-catena/arduino-lorawan.git  | 4bc0d48 | Sat, 9 May 2020 12:38:28 -0400  |
-| https://github.com/mcci-catena/Catena-Arduino-Platform.git  | 7620a89 | Fri, 31 Jul 2020 14:14:30 -0400  |
+| https://github.com/mcci-catena/Catena-Arduino-Platform.git  | 92019ca | Tue, 12 May 2020 01:34:08 -0400  |
 | https://github.com/mcci-catena/Catena-mcciadk.git  | a428006 | Sat, 21 Dec 2019 20:45:26 -0500  |
 | https://github.com/mcci-catena/MCCI_FRAM_I2C.git  | f0a5ea5 | Sat, 21 Dec 2019 16:17:01 -0500  |
 | https://github.com/tatobari/Q2-HX711-Arduino-Library.git  | ccda8d8 | Wed, 13 Mar 2019 12:41:44 -0300  |
@@ -31,8 +31,7 @@ Das sind die verwendeten Libraries [1]:
 | https://github.com/mcci-catena/SHT1x.git  | be7042c | Tue, 20 Sep 2011 13:56:23 +1000  |
 
 
-
-Patch arduino-lmic, so initial SF12 is used initially:
+Patch arduino-lmic, so initial SF10 is used initially:
 
 `
 [joerg@cinnamon src]$ git diff
@@ -45,7 +44,7 @@ index efff7d5..74efb37 100644
  #define LMICbandplan_isFSK()    (/* RX datarate */LMIC.dndr == EU868_DR_FSK)
  
 -#define LMICbandplan_getInitialDrJoin() (EU868_DR_SF7)
-+#define LMICbandplan_getInitialDrJoin() (EU868_DR_SF12)
++#define LMICbandplan_getInitialDrJoin() (EU868_DR_SF10)
  
  void LMICeu868_setBcnRxParams(void);
  #define LMICbandplan_setBcnRxParams()   LMICeu868_setBcnRxParams()
@@ -53,23 +52,3 @@ index efff7d5..74efb37 100644
 
 `[1]:
 [joerg@cinnamon libraries]$ for i in Adafruit_BME280_Library Adafruit_Sensor arduino-lmic arduino-lorawan Catena-Arduino-Platform Catena-mcciadk MCCI_FRAM_I2C Q2-HX711-Arduino-Library SparkFun_Qwiic_Scale_NAU7802_Arduino_Library OneWire SHT1x ; do cd $i; echo "| $(git remote -v |grep fetch |awk '{print $2}' |tr '\n' ' ') | $(git log --pretty=format:'%h | %cD ' -n 1) |" ; cd ..; done`
-
-
-## Some Facts about RSSI and SNR
-
-https://lora.readthedocs.io/en/latest/#rssi
-
-RSSI minimum = -120 dBm.
-
-RSSI < -90 dBm: this signal is extremely weak, at the edge of what a receiver can receive.
-RSSI -67dBm: this is a fairly strong signal.
-RSSI > -55dBm: this is a very strong signal.
-RSSI > -30dBm: your sniffer is sitting right next to the transmitter.
-
-https://lora.readthedocs.io/en/latest/#snr
-
-Typical LoRa SNR values are between: -20dB and +10dB
-
-A value closer to +10dB means the received signal is less corrupted.
-
-LoRa can demodulate signals which are -7.5 dB to -20 dB below the noise floor.

mini-beieli-node.ino

@@ -60,7 +60,6 @@ cCommandStream::CommandFn cmdGetScaleA;
 cCommandStream::CommandFn cmdGetScaleB;
 cCommandStream::CommandFn cmdCalibrateZeroScaleA;
 cCommandStream::CommandFn cmdCalibrateZeroScaleB;
-cCommandStream::CommandFn cmdCalibrateScales;
 cCommandStream::CommandFn cmdCalibrateScaleA;
 cCommandStream::CommandFn cmdCalibrateScaleB;
 cCommandStream::CommandFn cmdSetDebugLevel;
@@ -73,7 +72,6 @@ static const cCommandStream::cEntry sMyExtraCommmands[] =
   { "hello", cmdHello },
   { "get_calibration_settings", cmdGetCalibrationSettings },
   { "get_sensor_readings", cmdGetSensorReadings },
-  { "calibrate_scales", cmdCalibrateScales },
   { "calibrate_zero_scale_a", cmdCalibrateZeroScaleA },
   { "calibrate_zero_scale_b", cmdCalibrateZeroScaleB },
   { "calibrate_scale_a", cmdCalibrateScaleA },
@@ -101,7 +99,7 @@ sMyExtraCommands_top(
   \****************************************************************************/
 
 byte my_position = 0;    // what is our actual measurement, starts with 0
-unsigned long timer_pos0;
+long timer_pos0;
 
 // Global Variables
 LORA_data lora_data;
@@ -112,7 +110,6 @@ long iteration = 0;       // what iteration number do we have, starts with 0
 long package_counter = 0; // sent package counter
 bool send_in_progress = false;
 bool stop_iterations = false;
-bool start_new_iteration = false;
 bool next_package_is_init_package = true;
 uint32_t gRebootMs;
 
@@ -156,7 +153,7 @@ void setup(void)
 
   setup_platform();
   SetupScales(config_data.debug_level);
-  ClearLoraData(true);
+  ClearLoraData();
   setup_bme280();
 
   setup_flash();
@@ -377,12 +374,9 @@ void setup_uplink(void)
 void loop()
 {
   gCatena.poll();
-  if (start_new_iteration) {
-    StartNewIteration();
-  }
 }
 
-void ClearLoraData(bool clearLastValues)
+void ClearLoraData(void)
 {
   lora_data.version = LORA_DATA_VERSION;
   lora_data.vbat = 0;
@@ -412,15 +406,13 @@ void ClearLoraData(bool clearLastValues)
   my_position = 0;
 
   // We initialize last_sensor_reading
-  if (clearLastValues) {
-    last_sensor_reading.vbat = 0;
-    last_sensor_reading.weight1 = 0;
-    last_sensor_reading.weight2 = 0;
-    last_sensor_reading.weight = 0;
-    last_sensor_reading.temperature = 0;
-    last_sensor_reading.humidity = 0;
-    last_sensor_reading.pressure = 0;
-  }
+  last_sensor_reading.vbat = 0;
+  last_sensor_reading.weight1 = 0;
+  last_sensor_reading.weight2 = 0;
+  last_sensor_reading.weight = 0;
+  last_sensor_reading.temperature = 0;
+  last_sensor_reading.humidity = 0;
+  last_sensor_reading.pressure = 0;
 }
 
 void ShowLORAData(bool firstTime)
@@ -506,7 +498,7 @@ uint8_t GetVBatValue(int millivolts)
 void DoDeepSleep(uint32_t sleep_time)
 {
   if (config_data.debug_level > 0) {
-    gCatena.SafePrintf("DoDeepSleep, now going to deep sleep, millis: %d\n", millis());
+    gCatena.SafePrintf("DoDeepSleep, now going to deep sleep, millis: %d\n",millis());
   }
 
   // Prepare Deep Sleep
@@ -523,19 +515,13 @@ void DoDeepSleep(uint32_t sleep_time)
   deepSleepRecovery();
 
   if (config_data.debug_level > 0) {
-    gCatena.SafePrintf("done with deep sleep, millis: %d\n", millis());
+    gCatena.SafePrintf("done with deep sleep, millis: %d\n",millis());
   }
 }
 
-// Returns true if measurements are plausible, otherwise false
-bool ReadSensors(SENSOR_data &sensor_data) {
-  bool plausible;
-  bool plausible_a;
-  bool plausible_b;
+void ReadSensors(SENSOR_data &sensor_data) {
   SENSOR_data res;
   int32_t weight_current32;
-  int32_t weight_current32_a;
-  int32_t weight_current32_b;
   long w1_0_real;
   long w2_0_real;
 
@@ -553,13 +539,29 @@ bool ReadSensors(SENSOR_data &sensor_data) {
     if (config_data.debug_level > 0) {
       gCatena.SafePrintf("LoadCell is ready.\n");
     }
-    res.weight1 = (int32_t)ReadScale('A');
-    if (config_data.debug_level > 0) {
-      gCatena.SafePrintf("Load_cell 1 weight1_current: %ld\n", res.weight1);
+    if (config_data.cal_w1_0 != NOT_ATTACHED) {
+      res.weight1 = (int32_t)ReadScale('A');
+      if (config_data.debug_level > 0) {
+        gCatena.SafePrintf("Load_cell 1 weight1_current: %ld\n", res.weight1);
+      }
+    } else {
+      res.weight1 = 0;
+      w1_0_real = 0;
+      if (config_data.debug_level > 0) {
+        gCatena.SafePrintf("Load_cell 1 is disabled\n");
+      }
     }
-    res.weight2 = (int32_t)ReadScale('B');
-    if (config_data.debug_level > 0) {
-      gCatena.SafePrintf("Load_cell 2 weight2_current: %ld\n", res.weight2);
+    if (config_data.cal_w2_0 != NOT_ATTACHED) {
+      res.weight2 = (int32_t)ReadScale('B');
+      if (config_data.debug_level > 0) {
+        gCatena.SafePrintf("Load_cell 2 weight2_current: %ld\n", res.weight2);
+      }
+    } else {
+      res.weight2 = 0;
+      w2_0_real = 0;
+      if (config_data.debug_level > 0) {
+        gCatena.SafePrintf("Load_cell 2 is disabled\n");
+      }
     }
   }
   else {
@@ -572,32 +574,18 @@ bool ReadSensors(SENSOR_data &sensor_data) {
   PowerdownScale();
 
   // Gewicht berechnen
-  weight_current32_a = (int32_t)((res.weight1 - w1_0_real) / config_data.cal_w1_factor);
-  weight_current32_b = (int32_t)((res.weight2 - w2_0_real) / config_data.cal_w2_factor);
-  weight_current32 = (int32_t)((weight_current32_a + weight_current32_b) / 5.0);
-
-  // we check if weights are plausible
-  plausible_a = (weight_current32_a > -10000) && (weight_current32_a < 150000);
-  plausible_b = (weight_current32_b > -10000) && (weight_current32_b < 150000);
-  plausible = (plausible_a && plausible_b);
+  weight_current32 = (int32_t)((((res.weight1 - w1_0_real) / config_data.cal_w1_factor) + ((res.weight2 - w2_0_real) / config_data.cal_w2_factor)) / 5.0);
 
   if (weight_current32 < 0) {
-    if (plausible) { 
-      weight_current32 = 0;
-    } 
+    weight_current32 = 0;
   } else if (weight_current32 > UINT16_MAX) {
     //weight_current32 = UINT16_MAX;
     // we set the weight to 0, as such high values are not realistic and probably a sign for bad calibration...
     weight_current32 = 0;
   }
-  if (!plausible) {
-    weight_current32 = NOT_PLAUSIBLE_16;
-    if (!plausible_a) {
-      res.weight1 = NOT_PLAUSIBLE_32;
-    }
-    if (!plausible_b) {
-      res.weight2 = NOT_PLAUSIBLE_32;
-    }
+  if (config_data.cal_w1_0 == NOT_ATTACHED || config_data.cal_w2_0 == NOT_ATTACHED) {
+    // when at least one load cell is disabled, we multiply the measured weight by 2
+    weight_current32 = weight_current32 * 2;
   }
   res.weight = (uint16_t)weight_current32;
 
@@ -625,11 +613,9 @@ bool ReadSensors(SENSOR_data &sensor_data) {
   }
 
   sensor_data = res;
-  return plausible;
 }
 
 void StartNewIteration() {
-  start_new_iteration = false;
   uint32_t wait_time;
   wait_time = 0;
 
@@ -637,18 +623,7 @@ void StartNewIteration() {
   iteration++;
 
   SENSOR_data current_sensor_reading;
-  if (!ReadSensors(current_sensor_reading)) {
-    // we try a second time if Readings do not seem plausible
-    if (config_data.debug_level > 0) {
-      gCatena.SafePrintf("Readings do not seem plausible, try a second time\n");
-    }
-    delay(500);
-    if (!ReadSensors(current_sensor_reading)) {
-      if (config_data.debug_level > 0) {
-        gCatena.SafePrintf("Readings do not seem plausible for a second time, we give up!\n");
-      }
-    }
-  }
+  ReadSensors(current_sensor_reading);
   int16_t temp_change;
 
   // vBus
@@ -697,27 +672,25 @@ void StartNewIteration() {
   // we send data the first time the system is started, when the array is full
   // or when the weight has fallen more than threshold or the first measurement is
   // more than one hour old (which should not happen :-) )
-  bool big_difference = (abs(last_sensor_reading.weight - current_sensor_reading.weight) > SEND_DIFF_THRESHOLD_5GRAMS);
-  if ( (next_package_is_init_package) || (my_position >= MAX_VALUES_TO_SEND) || (big_difference) || ((millis() - timer_pos0) > 3600000)) {
+  if ( (next_package_is_init_package) || (my_position >= MAX_VALUES_TO_SEND) || (abs(last_sensor_reading.weight - current_sensor_reading.weight) > SEND_DIFF_THRESHOLD_5GRAMS) || ((millis() - timer_pos0) > 3600000)) {
     lora_data.offset_last_reading = (uint8_t)((millis() - timer_pos0) / 1000 / 60);
     if (config_data.debug_level > 0) {
-      gCatena.SafePrintf("startSendingUplink(), my_position: %d, iteration: %d, package_counter: %d, big_difference: %d\n", my_position, iteration, package_counter, big_difference);
+      gCatena.SafePrintf("startSendingUplink(), my_position: %d, iteration: %d, package_counter: %d\n", my_position, iteration, package_counter);
     }
     // the first <INIT_PACKETS> packets are "Init-Packets" or each INIT_PACKAGE_INTERVAL ...
-    // send confirmed if big_difference in weight
-    startSendingUplink(next_package_is_init_package, big_difference);
+    startSendingUplink(next_package_is_init_package);
     next_package_is_init_package = ((iteration < INIT_PACKETS) || ((package_counter % INIT_PACKAGE_INTERVAL) == 0));
 
     if (config_data.debug_level > 1) {
       gLed.Set(LedPattern::TwoShort);
     }
 
-    // Loop sending is in progress, timeout just in case after 600 seconds
-    unsigned long start_time = millis();
+    // Loop sending is in progress, timeout just in case after 300 seconds
+    long start_time = millis();
     if (config_data.debug_level > 0) {
       gCatena.SafePrintf("waiting while send is in progress\n");
     }
-    while (send_in_progress && ((millis() - start_time) < 600000))
+    while (send_in_progress && ((millis() - start_time) < 300000))
     {
       gCatena.poll();
       yield();
@@ -747,9 +720,6 @@ void StartNewIteration() {
   if (not(next_package_is_init_package)) {
     // we make the current sensor reading to the last one...
     last_sensor_reading = current_sensor_reading;
-  } else {
-    // we only copy the last weight
-    last_sensor_reading.weight = current_sensor_reading.weight;
   }
 
   uint32_t sleep_time_sec;
@@ -791,13 +761,13 @@ void StartNewIteration() {
   if (config_data.debug_level > 0) {
     gCatena.SafePrintf("LMIC.opmode just before Sleeping: %#x\n", LMIC.opmode);
     gCatena.SafePrintf("LMIC.globalDutyRate: %d, LMIC.globalDutyAvail: %d, os_getTime: %d\n", LMIC.globalDutyRate, LMIC.globalDutyAvail, os_getTime());
-    gCatena.SafePrintf("LMIC.seqnoUp: %d, LMIC.seqnoDn: %d\n", LMIC.seqnoUp, LMIC.seqnoDn);
+    gCatena.SafePrintf("LMIC.seqnoUp: %d, LMIC.seqnoDn: %d\n",LMIC.seqnoUp, LMIC.seqnoDn);
   }
 
-  if (!fUsbPower && !stop_iterations)  {
+  if (!fUsbPower) {
     DoDeepSleep(sleep_time_sec);
     if (! stop_iterations) {
-      start_new_iteration = true;
+      StartNewIteration();
     }
 
   }
@@ -814,7 +784,7 @@ void StartNewIteration() {
   }
 }
 
-void startSendingUplink(bool firstTime, bool confirmed)
+void startSendingUplink(bool firstTime)
 {
   send_in_progress = true;
 
@@ -838,11 +808,6 @@ void startSendingUplink(bool firstTime, bool confirmed)
     fConfirmed = true;
   }
 
-  // we can overwrite fConfirmed
-  if (confirmed) {
-    fConfirmed = true;
-  }
-
   if (firstTime) {
     if (config_data.debug_level > 0) {
       gCatena.SafePrintf("SendBuffer firstTime\n");
@@ -852,19 +817,19 @@ void startSendingUplink(bool firstTime, bool confirmed)
       if (config_data.debug_level > 0) {
         gCatena.SafePrintf("LMIC.opmode just after SendBuffer (successful): %#x\n", LMIC.opmode);
         gCatena.SafePrintf("LMIC.globalDutyRate: %d, LMIC.globalDutyAvail: %d, os_getTime: %d\n", LMIC.globalDutyRate, LMIC.globalDutyAvail, os_getTime());
-        gCatena.SafePrintf("LMIC.seqnoUp: %d, LMIC.seqnoDn: %d\n", LMIC.seqnoUp, LMIC.seqnoDn);
+        gCatena.SafePrintf("LMIC.seqnoUp: %d, LMIC.seqnoDn: %d\n",LMIC.seqnoUp, LMIC.seqnoDn);
       }
     }
     else {
       gCatena.SafePrintf("LMIC.opmode just before SendBuffer (failed): %#x\n", LMIC.opmode);
       gCatena.SafePrintf("LMIC.globalDutyRate: %d, LMIC.globalDutyAvail: %d, os_getTime: %d\n", LMIC.globalDutyRate, LMIC.globalDutyAvail, os_getTime());
-      gCatena.SafePrintf("LMIC.seqnoUp: %d, LMIC.seqnoDn: %d\n", LMIC.seqnoUp, LMIC.seqnoDn);
+      gCatena.SafePrintf("LMIC.seqnoUp: %d, LMIC.seqnoDn: %d\n",LMIC.seqnoUp, LMIC.seqnoDn);
     }
   } else {
     if (config_data.debug_level > 0) {
       gCatena.SafePrintf("LMIC.opmode just before SendBuffer: %#x\n", LMIC.opmode);
       gCatena.SafePrintf("LMIC.globalDutyRate: %d, LMIC.globalDutyAvail: %d, os_getTime: %d\n", LMIC.globalDutyRate, LMIC.globalDutyAvail, os_getTime());
-      gCatena.SafePrintf("LMIC.seqnoUp: %d, LMIC.seqnoDn: %d\n", LMIC.seqnoUp, LMIC.seqnoDn);
+      gCatena.SafePrintf("LMIC.seqnoUp: %d, LMIC.seqnoDn: %d\n",LMIC.seqnoUp, LMIC.seqnoDn);
       gCatena.SafePrintf("SendBuffer not firstTime\n");
     }
     if (gLoRaWAN.SendBuffer((uint8_t*)&lora_data, sizeof(LORA_data), sendBufferDoneCb, NULL, fConfirmed, kUplinkPort)) {
@@ -872,16 +837,16 @@ void startSendingUplink(bool firstTime, bool confirmed)
       if (config_data.debug_level > 0) {
         gCatena.SafePrintf("LMIC.opmode just after SendBuffer (successful): %#x\n", LMIC.opmode);
         gCatena.SafePrintf("LMIC.globalDutyRate: %d, LMIC.globalDutyAvail: %d, os_getTime: %d\n", LMIC.globalDutyRate, LMIC.globalDutyAvail, os_getTime());
-        gCatena.SafePrintf("LMIC.seqnoUp: %d, LMIC.seqnoDn: %d\n", LMIC.seqnoUp, LMIC.seqnoDn);
+        gCatena.SafePrintf("LMIC.seqnoUp: %d, LMIC.seqnoDn: %d\n",LMIC.seqnoUp, LMIC.seqnoDn);
       }
     } else {
       gCatena.SafePrintf("LMIC.opmode just before SendBuffer (failed): %#x\n", LMIC.opmode);
       gCatena.SafePrintf("LMIC.globalDutyRate: %d, LMIC.globalDutyAvail: %d, os_getTime: %d\n", LMIC.globalDutyRate, LMIC.globalDutyAvail, os_getTime());
-      gCatena.SafePrintf("LMIC.seqnoUp: %d, LMIC.seqnoDn: %d\n", LMIC.seqnoUp, LMIC.seqnoDn);
+      gCatena.SafePrintf("LMIC.seqnoUp: %d, LMIC.seqnoDn: %d\n",LMIC.seqnoUp, LMIC.seqnoDn);
     }
   }
 
-  ClearLoraData(false);
+  ClearLoraData();
 }
 
 static void sendBufferDoneCb(
@@ -943,7 +908,7 @@ void doSleepAlert(const bool fDeepSleep)
   }
 
   for (int i = 0; i <= 15; i++) {
-    unsigned long prevPrint = millis();
+    long prevPrint = millis();
     while (os_queryTimeCriticalJobs(ms2osticks(2000)) != 0)
     {
       gCatena.poll();
@@ -1010,7 +975,7 @@ static void startNewIterationCb(osjob_t* pJob)
   }
 
   if (! stop_iterations) {
-    start_new_iteration = true;
+    StartNewIteration();
   }
 }
 
@@ -1143,6 +1108,7 @@ cCommandStream::CommandStatus cmdHello(cCommandStream * pThis, void *pContext, i
   return cCommandStream::CommandStatus::kSuccess;
 }
 
+
 cCommandStream::CommandStatus cmdGetCalibrationSettings(cCommandStream * pThis, void *pContext, int argc, char **argv)
 {
   pThis->printf("{\n");
@@ -1207,33 +1173,20 @@ cCommandStream::CommandStatus cmdCalibrateZeroScaleB(cCommandStream * pThis, voi
   return cCommandStream::CommandStatus::kSuccess;
 }
 
-cCommandStream::CommandStatus cmdCalibrateScales(cCommandStream * pThis, void *pContext, int argc, char **argv)
-{
-  String s_cal_w1_0(argv[1]);
-  String s_cal_w1_factor(argv[2]);
-  String s_cal_w2_0(argv[3]);
-  String s_cal_w2_factor(argv[4]);
-
-  config_data.cal_w1_0 = s_cal_w1_0.toInt();
-  config_data.cal_w1_factor = s_cal_w1_factor.toFloat();
-  config_data.cal_w2_0 = s_cal_w2_0.toInt();
-  config_data.cal_w2_factor = s_cal_w2_factor.toFloat();
-
-  gCatena.getFram()->saveField(cFramStorage::kAppConf, (const uint8_t *)&config_data, sizeof(config_data));
-
-  pThis->printf("{ \"msg\": \"calibrate_scales was successful\" }\n");
-
-  return cCommandStream::CommandStatus::kSuccess;
-}
-
 cCommandStream::CommandStatus cmdCalibrateScaleA(cCommandStream * pThis, void *pContext, int argc, char **argv)
 {
   String w1_gramm(argv[1]);
   long weight1;
 
-  setup_scales();
-  weight1 = ReadScale('A');
-  config_data.cal_w1_factor = (float)((weight1 - config_data.cal_w1_0) / w1_gramm.toFloat());
+  if (w1_gramm == "NA") {
+    // scale a is not connected
+    config_data.cal_w1_factor = 1.0;
+    config_data.cal_w1_0 = NOT_ATTACHED;
+  } else {
+    setup_scales();
+    weight1 = ReadScale('A');
+    config_data.cal_w1_factor = (float)((weight1 - config_data.cal_w1_0) / w1_gramm.toFloat());
+  }
 
   gCatena.getFram()->saveField(cFramStorage::kAppConf, (const uint8_t *)&config_data, sizeof(config_data));
 
@@ -1247,9 +1200,15 @@ cCommandStream::CommandStatus cmdCalibrateScaleB(cCommandStream * pThis, void *p
   String w2_gramm(argv[1]);
   long weight2;
 
-  setup_scales();
-  weight2 = ReadScale('B');
-  config_data.cal_w2_factor = (float)((weight2 - config_data.cal_w2_0) / w2_gramm.toFloat());
+  if (w2_gramm == "NA") {
+    // scale b is not connected
+    config_data.cal_w2_factor = 1.0;
+    config_data.cal_w2_0 = NOT_ATTACHED;
+  } else {
+    setup_scales();
+    weight2 = ReadScale('B');
+    config_data.cal_w2_factor = (float)((weight2 - config_data.cal_w2_0) / w2_gramm.toFloat());
+  }
 
   gCatena.getFram()->saveField(cFramStorage::kAppConf, (const uint8_t *)&config_data, sizeof(config_data));
 

mini_beieli_node.h

@@ -56,7 +56,7 @@ enum {
   |
   \****************************************************************************/
 
-static const int32_t fwVersion = 20200804;
+static const int32_t fwVersion = 20200605;
 
 static const byte INIT_PACKAGE_INTERVAL = 100;  // send an init package every 100 packages;
 static const byte MAX_VALUES_TO_SEND = 8;
@@ -65,8 +65,7 @@ static const uint8_t LORA_DATA_VERSION = 1;
 static const uint8_t LORA_DATA_VERSION_FIRST_PACKAGE = 128;
 static const uint32_t PRESSURE_OFFSET = 825;
 static const uint16_t SEND_DIFF_THRESHOLD_5GRAMS = 20;   // when weight changes by 100g, then send data
-static const long NOT_PLAUSIBLE_16 = 65535;
-static const long NOT_PLAUSIBLE_32 = 2147483647;
+static const long NOT_ATTACHED = -2147483648;
 static const byte INIT_PACKETS = 5;
 
 // must be 64 bytes long (size of kAppConf)

mini_beieli_node_nau7802.h

@@ -10,6 +10,7 @@
 
 #define SAMPLES 5
 
+NAU7802 myScale; //Create instance of the NAU7802 class
 
 byte debug_level;
 
@@ -26,10 +27,14 @@ bool InitializeScales()
   result = myScale.reset(); //Reset all registers
   result &= myScale.powerUp(); //Power on analog and digital sections of the scale
 
+  result &= myScale.setIntPolarityHigh();
   result &= myScale.setLDO(NAU7802_LDO_3V3); //Set LDO to 3.3V
   result &= myScale.setGain(NAU7802_GAIN_128); //Set gain to 128
   result &= myScale.setSampleRate(NAU7802_SPS_40); //Set samples per second to 40
   result &= myScale.setRegister(NAU7802_ADC, 0x30); //Turn off CLK_CHP. From 9.1 power on sequencing.
+  result &= myScale.clearBit(NAU7802_PGA_PWR_PGA_CAP_EN, NAU7802_PGA_PWR);
+  //result &= myScale.setRegister(NAU7802_OTP_B1, 0x30);
+  //result &= myScale.setRegister(NAU7802_PGA, NAU7802_PGA_OUT_EN | NAU7802_PGA_CHP_DIS);
 
   result &= myScale.calibrateAFE(); //Re-cal analog front end when we change gain, sample rate, or channel
 
@@ -42,7 +47,7 @@ bool SetupScales(byte dbg_level)
   if (debug_level > 0) {
     gCatena.SafePrintf("SetupScales start\n");
   }
-  //  pinMode(interruptPin, INPUT);
+//  pinMode(interruptPin, INPUT);
 
   if (!myScale.begin(Wire, false))
   {
@@ -73,7 +78,7 @@ long ReadScale(char channel)
   } else {
     channelNumber = NAU7802_CHANNEL_2;
   }
-  unsigned long startTime = millis();
+  long startTime = millis();
   myScale.setChannel(channelNumber);
   bool calibrate_success = myScale.calibrateAFE();
   if (! calibrate_success) {
@@ -88,37 +93,34 @@ long ReadScale(char channel)
   int const num_scale_readings = SAMPLES; // number of instantaneous scale readings to calculate the median
 
   // we use the median, not the average, see https://community.particle.io/t/boron-gpio-provides-less-current-than-electrons-gpio/46647/13
-  long readings[num_scale_readings];  // create array to hold readings
+  long readings[num_scale_readings];  // create arry to hold readings
   for (int i = 0; i < num_scale_readings; i++) {
     //while (digitalRead(interruptPin) == LOW) {
-    unsigned long mytimer = millis();
-    int timeouts = 0;
-    while (! myScale.available() && (timeouts < 3)) {
+    long mytimer = millis();
+    while (! myScale.available()) {
       // we set a timeout of 10 seconds for the measurement...
       if ((millis() - mytimer) > 10000) {
-        timeouts = timeouts + 1;
         // Timeout reading scale...
         Wire.endTransmission(true);
-        delay(50);
-        InitializeScales();
         if (debug_level > 0) {
           gCatena.SafePrintf("Timeout while reading scale...\n");
         }
+        break;
       }
-      delay(50);
+      delay(1);
     }
     long reading;
     if (myScale.available()) {
-      reading = myScale.getReading();
-      readings[i] = reading;
+      reading = myScale.getReading();  
+      readings[i] = reading;  
     }
     if (debug_level > 0) {
       gCatena.SafePrintf("Reading: %d\n", reading);
     }
-    delay(50);
+    delay(10);
   }
 
-  unsigned long duration = millis() - startTime;
+  long duration = millis() - startTime;
   res = median(readings, num_scale_readings); // calculate median
 
   if (debug_level > 0) {