I have precisely the same issue! In my case, unlike Thomas, I cannot make the temperature configuration persist after setting it manually. I’ve tried unplugging the serial cable from the Mac/Chrome web setup and plugging it back into the EmonPi with the EmonVS left in, and unplugged. In neither case do the T values continue.
(I’m using the serial port to input data to EmonHub (no RF) )
I originally had this problem with an existing (assumed clone) ds18b20 I had on-hand (plugged in via RJ45 as T1) and so bought a new one directly from you last week (plugged in as T2 via the block). Both have standard 1m leads with no fancy wiring.
Interestingly, as the initial temperature enabled messages come in, you can see that the ‘original’ sensor T2 has a single out-of-band reading of 304 but then immediately settles to ~21.6, the ‘fake’ sensor has two out-of-band readings at 25 but then settles to ~21.8. This behaviour is reproducible.
As a final quirk when I first installed the new firmware (late last night) T1 started producing values. However the P2 sensor was defaulted to 50A (I’m using a 100A sensor) and so it was this mornings reconfigure of P2 to use 100A that broke the temperature.
Here’s the configuration output:
emonTx V4 CM Continuous Monitoring V1.5.4
OpenEnergyMonitor.org
Loaded EEPROM config
Settings:
Band 433 MHz, Group 210, Node 17, 7 dBm
Calibration:
vCal = 807.86
assumedV = 240.00
i1Cal = 300.30
i1Lead = 3.20
i2Cal = 300.30
i2Lead = 3.20
i3Cal = 150.15
i3Lead = 3.20
i4Cal = 60.06
i4Lead = 3.20
i5Cal = 60.06
i5Lead = 3.20
i6Cal = 60.06
i6Lead = 3.20
datalog = 9.80
pulses = 1
pulse period = 100
RF off
temp_enable = 0
JSON Format Off
Reference voltage calibration: 1.0301
No temperature sensors detected, disabling temperature
AC missing - Apparent Power calc enabled, assuming 240.00 V
MSG:1,Vrms:240.00,P1:720,P2:434,P3:217,P4:87,P5:86,P6:87,E1:803,E2:0,E3:0,E4:0,E5:0,E6:0,T1:0.00,T2:0.00,T3:0.00,pulse:0
MSG:2,Vrms:240.00,P1:580,P2:11,P3:5,P4:2,P5:2,P6:2,E1:804,E2:0,E3:0,E4:0,E5:0,E6:0,T1:0.00,T2:0.00,T3:0.00,pulse:0
MSG:3,Vrms:240.00,P1:578,P2:11,P3:5,P4:2,P5:2,P6:2,E1:806,E2:0,E3:0,E4:0,E5:0,E6:0,T1:0.00,T2:0.00,T3:0.00,pulse:0
Temperature on
MSG:4,Vrms:240.00,P1:579,P2:11,P3:5,P4:2,P5:2,P6:2,E1:808,E2:0,E3:0,E4:0,E5:0,E6:0,T1:25.00,T2:304.00,pulse:0
MSG:5,Vrms:240.00,P1:569,P2:11,P3:5,P4:2,P5:2,P6:2,E1:809,E2:0,E3:0,E4:0,E5:0,E6:0,T1:25.00,T2:21.50,pulse:0
MSG:6,Vrms:240.00,P1:571,P2:11,P3:5,P4:2,P5:2,P6:2,E1:811,E2:0,E3:0,E4:0,E5:0,E6:0,T1:21.87,T2:21.62,pulse:0