Two identical Si7021 nodes - one just sending temperature

[zerosquared]

Hey there!
I'm facing a problem that maybe is totally easy because I'm missing something, but I just can't find the problem.

I have two identical nodes: Arduino Nano, NRF24L01+, SI7021 Sensor.
The code on both is identical (see below) for everything but the node-ID.

For some reason the first node (MY_NODE_ID 1) will just send the temperature value to my gateway, however I can see that the sensor reports the humidity value in the serial debugger.
With MQTT.fx I can see, that node 2 sends the temperature-data to mygateway1-out/2/1/1/0/0; the humidity-data to mygateway1-out/2/1/0/1/0 and node 1 sends just the temperature to mygateway1-out/1/1/1/0/0, nothing else.

What am I missing? I'll post the debug-log down below.
If anyone can help me I'd be really glad.
Thank you very much in advance!

Here is the code from the node; in this case with ID 1; the second node has the ID set to 2.

// Enable debug prints
#define MY_DEBUG
#define MY_NODE_ID 1

// Enable REPORT_BATTERY_LEVEL to measure battery level and send changes to gateway
//#define REPORT_BATTERY_LEVEL

// Enable and select radio type attached 
#define MY_RADIO_NRF24
//#define MY_RADIO_RFM69
//#define MY_RS485

#include <MySensors.h>  

#define CHILD_ID_HUM  0
#define CHILD_ID_TEMP 1

static bool metric = true;

// Sleep time between sensor updates (in milliseconds)
static const uint64_t UPDATE_INTERVAL = 10000;

#include <SI7021.h>
static SI7021 sensor;

#ifdef REPORT_BATTERY_LEVEL
#include <Vcc.h>
static uint8_t oldBatteryPcnt = 200;  // Initialize to 200 to assure first time value will be sent.
const float VccMin        = 1.8;      // Minimum expected Vcc level, in Volts: Brownout at 1.8V    -> 0%
const float VccMax        = 2.0*1.6;  // Maximum expected Vcc level, in Volts: 2xAA fresh Alkaline -> 100%
const float VccCorrection = 1.0;      // Measured Vcc by multimeter divided by reported Vcc
static Vcc vcc(VccCorrection); 
#endif

void presentation()  
{ 
  // Send the sketch info to the gateway
  sendSketchInfo("TemperatureAndHumidity Si7021", "1.0");

  // Present sensors as children to gateway
  present(CHILD_ID_HUM, S_HUM,   "Humidity");
  present(CHILD_ID_TEMP, S_TEMP, "Temperature");

  metric = getControllerConfig().isMetric;
}

void setup()
{
  while (not sensor.begin())
  {
    Serial.println(F("Sensor not detected!"));
    delay(5000);
  }
}


void loop()      
{  
  // Read temperature & humidity from sensor.
  const float temperature = float( metric ? sensor.getCelsiusHundredths() : sensor.getFahrenheitHundredths() ) / 100.0;
  const float humidity    = float( sensor.getHumidityBasisPoints() ) / 100.0;

#ifdef MY_DEBUG
  Serial.print(F("Temp "));
  Serial.print(temperature);
  Serial.print(metric ? 'C' : 'F');
  Serial.print(F("\tHum "));
  Serial.println(humidity);
#endif

  static MyMessage msgHum( CHILD_ID_HUM,  V_HUM );
  static MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);

  send(msgTemp.set(temperature, 2));
  send(msgHum.set(humidity, 2));

#ifdef REPORT_BATTERY_LEVEL
  const uint8_t batteryPcnt = static_cast<uint8_t>(0.5 + vcc.Read_Perc(VccMin, VccMax));

#ifdef MY_DEBUG
  Serial.print(F("Vbat "));
  Serial.print(vcc.Read_Volts());
  Serial.print(F("\tPerc "));
  Serial.println(batteryPcnt);
#endif

  // Battery readout should only go down. So report only when new value is smaller than previous one.
  if ( batteryPcnt < oldBatteryPcnt )
  {
      sendBatteryLevel(batteryPcnt);
      oldBatteryPcnt = batteryPcnt;
  }
#endif

  // Sleep until next update to save energy
  sleep(UPDATE_INTERVAL); 
}

Heres the debug-log from node 1:

16 MCO:BGN:INIT NODE,CP=RNNNA---,REL=255,VER=2.3.1
26 TSM:INIT
27 TSF:WUR:MS=0
33 TSM:INIT:TSP OK
35 TSM:INIT:STATID=1
37 TSF:SID:OK,ID=1
39 TSM:FPAR
75 TSF:MSG:SEND,1-1-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
156 TSF:MSG:READ,0-0-1,s=255,c=3,t=8,pt=1,l=1,sg=0:0
160 TSF:MSG:FPAR OK,ID=0,D=1
2082 TSM:FPAR:OK
2083 TSM:ID
2084 TSM:ID:OK
2086 TSM:UPL
2089 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=24,pt=1,l=1,sg=0,ft=0,st=OK:1
2104 TSF:MSG:READ,0-0-1,s=255,c=3,t=25,pt=1,l=1,sg=0:1
2108 TSF:MSG:PONG RECV,HP=1
2111 TSM:UPL:OK
2112 TSM:READY:ID=1,PAR=0,DIS=1
2152 !TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=15,pt=6,l=2,sg=0,ft=0,st=NACK:0100
4195 !TSF:MSG:SEND,1-1-0-0,s=255,c=0,t=17,pt=0,l=5,sg=0,ft=1,st=NACK:2.3.1
4238 !TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=6,pt=1,l=1,sg=0,ft=2,st=NACK:0
6246 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=11,pt=0,l=25,sg=0,ft=3,st=OK:TemperatureAndHumidity Si
6291 !TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=12,pt=0,l=3,sg=0,ft=0,st=NACK:1.0
6337 !TSF:MSG:SEND,1-1-0-0,s=0,c=0,t=7,pt=0,l=8,sg=0,ft=1,st=NACK:Humidity
6385 !TSF:MSG:SEND,1-1-0-0,s=1,c=0,t=6,pt=0,l=11,sg=0,ft=2,st=NACK:Temperature
6392 MCO:REG:REQ
6429 !TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=26,pt=1,l=1,sg=0,ft=3,st=NACK:2
8436 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=26,pt=1,l=1,sg=0,ft=4,st=OK:2
8448 TSF:MSG:READ,0-0-1,s=255,c=3,t=27,pt=1,l=1,sg=0:1
8453 MCO:PIM:NODE REG=1
8455 MCO:BGN:STP
8457 MCO:BGN:INIT OK,TSP=1
Temp 20.02C	Hum 56.63
8522 !TSF:MSG:SEND,1-1-0-0,s=1,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=NACK:20.02
8567 !TSF:MSG:SEND,1-1-0-0,s=0,c=1,t=1,pt=7,l=5,sg=0,ft=1,st=NACK:56.63
8573 MCO:SLP:MS=10000,SMS=0,I1=255,M1=255,I2=255,M2=255
8579 TSF:TDI:TSL
8581 MCO:SLP:WUP=-1
8583 TSF:TRI:TSB
Temp 20.01C	Hum 56.64
8651 !TSF:MSG:SEND,1-1-0-0,s=1,c=1,t=0,pt=7,l=5,sg=0,ft=2,st=NACK:20.01
8696 !TSF:MSG:SEND,1-1-0-0,s=0,c=1,t=1,pt=7,l=5,sg=0,ft=3,st=NACK:56.64
8702 MCO:SLP:MS=10000,SMS=0,I1=255,M1=255,I2=255,M2=255
8708 TSF:TDI:TSL
8710 MCO:SLP:WUP=-1
8712 TSF:TRI:TSB
Temp 20.01C	Hum 56.58
8744 TSF:MSG:SEND,1-1-0-0,s=1,c=1,t=0,pt=7,l=5,sg=0,ft=4,st=OK:20.01
8790 !TSF:MSG:SEND,1-1-0-0,s=0,c=1,t=1,pt=7,l=5,sg=0,ft=0,st=NACK:56.58
8796 MCO:SLP:MS=10000,SMS=0,I1=255,M1=255,I2=255,M2=255
8801 TSF:TDI:TSL
8803 MCO:SLP:WUP=-1
8805 TSF:TRI:TSB

[rejoe2]

@zerosquared
Imo there's not really a problem with the sensor itself but with the transmission towards the GW.

8696 !TSF:MSG:SEND,1-1-0-0,s=0,c=1,t=1,pt=7,l=5,sg=0,ft=3,st=NACK:56.64

The only exception in your log is wrt one temperature reading. So have a look at the troubleshooting guide; especially use a capacitor to enhance power sourcing of the nRF modules.