DeltaTempFanController | Electronics and domotica

Design principles

Used components

PWM driver needed?

If we would like to control the fan speed, then we should use a Arduino pin that supports PWM.

Hence, we choose D3.

Wiring

The pinout on a MOSFET is (from left to right, looking at the printed side of the MOSFET) gate - drain - source.

Low side driver

Code

See https://www.mysensors.org/build/humidity_si7021 and https://github.com/mysensors/MySensors/blob/development/examples/GatewaySerial/GatewaySerial.ino

Development

Use the Arduino IDE or PlatformIO for development.

For PlatformIO you will need this folder structure:

Project-Node-DeltaTempFanController
|-- platformio.ini
|-- DeltaTempFanController
|  |-- DeltaTempFanController.ino
|-- lib
|  |-- SI7021
|  |  |-- SI7021.cpp
|  |  |-- SI7021.h

These files can be downloaded at:

DeltaTempFanController.ino

platformio.ini

SI7021.cpp

SI7021.h

First sign of life

Serial output after first successful start:

16 MCO:BGN:INIT NODE,CP=RNNNA---,FQ=16,REL=255,VER=2.3.2
26 TSM:INIT
28 TSF:WUR:MS=0
34 TSM:INIT:TSP OK
36 TSF:SID:OK,ID=1
37 TSM:FPAR
41 ?TSF:MSG:SEND,1-1-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
447 TSF:MSG:READ,0-0-1,s=255,c=3,t=8,pt=1,l=1,sg=0:0
452 TSF:MSG:FPAR OK,ID=0,D=1
2050 TSM:FPAR:OK
2051 TSM:ID
2052 TSM:ID:OK
2054 TSM:UPL
2059 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=24,pt=1,l=1,sg=0,ft=0,st=OK:1
2067 TSF:MSG:READ,0-0-1,s=255,c=3,t=25,pt=1,l=1,sg=0:1
2071 TSF:MSG:PONG RECV,HP=1
2074 TSM:UPL:OK
2076 TSM:READY:ID=1,PAR=0,DIS=1
2082 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=15,pt=6,l=2,sg=0,ft=0,st=OK:0100
2089 TSF:MSG:READ,0-0-1,s=255,c=3,t=15,pt=6,l=2,sg=0:0100
2097 TSF:MSG:SEND,1-1-0-0,s=255,c=0,t=17,pt=0,l=5,sg=0,ft=0,st=OK:2.3.2
2107 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=6,pt=1,l=1,sg=0,ft=0,st=OK:0
2121 TSF:MSG:READ,0-0-1,s=255,c=3,t=6,pt=0,l=1,sg=0:M
2131 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=11,pt=0,l=22,sg=0,ft=0,st=OK:DeltaTempFanController
2142 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=12,pt=0,l=3,sg=0,ft=0,st=OK:1.0
2150 TSF:MSG:SEND,1-1-0-0,s=0,c=0,t=6,pt=0,l=22,sg=0,ft=0,st=OK:DTFC - Top Temperature
2210 TSF:MSG:SEND,1-1-0-0,s=1,c=0,t=7,pt=0,l=19,sg=0,ft=0,st=OK:DTFC - Top Humidity
2269 TSF:MSG:SEND,1-1-0-0,s=2,c=0,t=6,pt=0,l=25,sg=0,ft=0,st=OK:DTFC - Bottom Temperature
2329 TSF:MSG:SEND,1-1-0-0,s=3,c=0,t=7,pt=0,l=22,sg=0,ft=0,st=OK:DTFC - Bottom Humidity
2392 TSF:MSG:SEND,1-1-0-0,s=4,c=0,t=4,pt=0,l=10,sg=0,ft=0,st=OK:DTFC - Fan
2449 MCO:REG:REQ
2452 TSF:MSG:SEND,1-1-0-0,s=255,c=3,t=26,pt=1,l=1,sg=0,ft=0,st=OK:2
2459 TSF:MSG:READ,0-0-1,s=255,c=3,t=27,pt=1,l=1,sg=0:1
2463 MCO:PIM:NODE REG=1
2466 MCO:BGN:STP
DeltaTempFanController 1.02817 MCO:BGN:INIT OK,TSP=1
2859 TSF:MSG:SEND,1-1-0-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:27.74
2919 TSF:MSG:SEND,1-1-0-0,s=1,c=1,t=1,pt=7,l=5,sg=0,ft=0,st=OK:0.52
2977 TSF:MSG:SEND,1-1-0-0,s=2,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:23.49
3034 TSF:MSG:SEND,1-1-0-0,s=3,c=1,t=1,pt=7,l=5,sg=0,ft=0,st=OK:0.67
3094 TSF:MSG:SEND,1-1-0-0,s=4,c=1,t=3,pt=2,l=2,sg=0,ft=0,st=OK:10
3150 MCO:SLP:MS=10000,SMS=0,I1=255,M1=255,I2=255,M2=255
3155 TSF:TDI:TSL

About combined Temp + Hum MySensors

Q:	I'm using mysensors to send temp and hum to domoticz. When registring the node I see temp and hum added as 2 nodes separately: Temp + Humidity WTGR800 Temp LaCrosse TX3 Fine with me, but now only the temp+hum is updated. The temp is only update once. How can I solve this?
A:	You cant, first it receives the temp, then the humidity, and domoticz makes it a TEMP+HUM sensor, it is supposed to be. Place a $ character infront of the name of the separate temp sensor, and it won't be visible (only in the devices table). If MySensors had a S_TEMPHUM type, we could avoid this.

I'm using mysensors to send temp and hum to domoticz. When registring the node I see temp and hum added as 2 nodes separately:

Temp + Humidity WTGR800
Temp LaCrosse TX3

Fine with me, but now only the temp+hum is updated. The temp is only update once. How can I solve this?

You cant, first it receives the temp, then the humidity, and domoticz makes it a TEMP+HUM sensor, it is supposed to be. Place a $ character infront of the name of the separate temp sensor, and it won't be visible (only in the devices table). If MySensors had a S_TEMPHUM type, we could avoid this.

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