Simple Thermostat Example not working with DS18B20
Fibra
I`ve bean having hard time with example from this page: https://tasmota.github.io/docs/Rules/#watchdog-for-wi-fi-router
I have tried several installations and pin configurations, both on the Wemos Mini and ESP32, each with coresponding firmware.
On my last attempt with Wemos Mini, I have configured as follows
GPIO 0: Relay 1
GPIO 2: DS18B20
GPIO 14: Switch 1
I have issued all these config commands:
SwitchMode1 3 <- Use the switch1 as pushbutton (It will allow us to disable the link between the button and the relay by inserting a rule to dictate what the pushbutton will do - NOTE: Until rules are created the pushbutton will still control the relay!)
Rule1 1 <- turn on rules
Rule1 4 <- turn off one-shot rule
TelePeriod 60 <- check temp every minute
SetOption26 1 <- use Power1 on mqtt messages
SetOption0 0 <- dont save relay status on eeprom
PowerOnState 0 <- start all relays off
Mem1 0 <- thermostat status: 0-off 1-enabled - View or set by MQTT cmnd/mqttTopic/mem1
Mem2 25 <- setpoint Temp upper limit - View or set by MQTT cmnd/mqttTopic/mem2
Mem3 23 <- setpoint Temp lower limit - View or set by MQTT cmnd/mqttTopic/mem3
Var1 0 <- thermostat actual status: 1-OK 0-NOT READY - View by MQTT cmnd/mqttTopic/var1
followed by these commands:
Rule1
ON system#boot DO RuleTimer1 70 ENDON
ON Switch1#State DO event toggling1=%mem1% ENDON
ON event#toggling1=0 DO mem1 1 ENDON
ON event#toggling1=1 DO mem1 0 ENDON
ON Rules#Timer=1 DO Backlog var1 0; RuleTimer1 70; Power1 0 ENDON
originally it is designed to be used with SI7021
ON tele-SI7021#temperature DO Backlog var1 1; RuleTimer1 70; event
so, I have changed it to:
ON tele-DS18B20#temperature DO Backlog var1 1; RuleTimer1 70; event ctrl_ready=1; event temp_demand=%value% ENDON
the rest of the code is left unchanged
ON event#ctrl_ready>%mem1% DO var1 0 ENDON
ON event#temp_demand>%mem2% DO Power1 0 ENDON
ON event#temp_demand<%mem3% DO Power1 %var1% ENDON
When I test the example from the page without the sensor, it works as it is designed:
It activates Relay (LED in my case) on the GPIO 0 when I issue command: event temp=26
deactivates Relay when I issue command: event temp=20
deactivates Relay if I wait more than 1 minute
reactivates the rule if I issue again event temp=20
So, I am not sure why does it not work with this line:
ON tele-DS18B20#temperature DO Backlog var1 1; RuleTimer1 70; event ctrl_ready=1; event temp_demand=%value% ENDON
Here is the log:
12:55:14.615 RUL: EVENT#TOGGLING1=0 performs "mem1 1"
12:55:14.623 MQT: stat/tasmota_E225F8/RESULT = {"Mem1":"1"}
12:55:21.882 CMD: var1
12:55:21.890 MQT: stat/tasmota_E225F8/RESULT = {"Var1":"0"}
12:55:32.373 MQT: tele/tasmota_E225F8/STATE = {"Time":"2022-06-03T12:55:32","Uptime":"0T00:37:10","UptimeSec":2230,"Heap":26,"SleepMode":"Dynamic","Sleep":50,"LoadAvg":21,"MqttCount":1,"POWER1":"OFF","Wifi":{"AP":1,"SSId":"Assus_2G","BSSId":"FC:34:97:06:44:38","Channel":4,"Mode":"11n","RSSI":100,"Signal":-38,"LinkCount":1,"Downtime":"0T00:00:04"}}
12:55:32.386 MQT: tele/tasmota_E225F8/SENSOR = {"Time":"2022-06-03T12:55:32","Switch1":"ON","DS18B20":{"Id":"01201C82DD6E","Temperature":26.2},"TempUnit":"C"}
12:56:19.385 RUL: RULES#TIMER=1 performs "Backlog var1 0; RuleTimer1 70; Power1 0"
12:56:19.422 MQT: stat/tasmota_E225F8/RESULT = {"Var1":"0"}
12:56:19.624 MQT: stat/tasmota_E225F8/RESULT = {"T1":70,"T2":0,"T3":0,"T4":0,"T5":0,"T6":0,"T7":0,"T8":0}
12:56:19.871 MQT: stat/tasmota_E225F8/RESULT = {"POWER1":"OFF"}
12:56:19.876 MQT: stat/tasmota_E225F8/POWER1 = OFF
Despite
12:58:26.135 CMD: mem1
12:58:26.142 MQT: stat/tasmota_E225F8/RESULT = {"Mem1":"1"}
12:58:32.372 MQT: tele/tasmota_E225F8/STATE = {"Time":"2022-06-03T12:58:32","Uptime":"0T00:40:10","UptimeSec":2410,"Heap":26,"SleepMode":"Dynamic","Sleep":50,"LoadAvg":19,"MqttCount":1,"POWER1":"OFF","Wifi":{"AP":1,"SSId":"Assus_2G","BSSId":"FC:34:97:06:44:38","Channel":4,"Mode":"11n","RSSI":100,"Signal":-39,"LinkCount":1,"Downtime":"0T00:00:04"}}
12:58:32.390 MQT: tele/tasmota_E225F8/SENSOR = {"Time":"2022-06-03T12:58:32","Switch1":"ON","DS18B20":{"Id":"01201C82DD6E","Temperature":26.4},"TempUnit":"C"}
I have this:
12:58:35.554 MQT: stat/tasmota_E225F8/RESULT = {"Var1":"0"}
Sorry if I`ve included so much data, I have thought it would be helpfull to know what exactly I did.
Thanks in advance for the help.
Sasha
Philip Knowles
I’m not saying this I the issue but GPIO2 is possibly not a good choice for the DS18B20. It’s connected to the onboard LED and pulled high at boot. Almost any other pin would be better (other than GPIO16). This page is a useful resource
ESP8266 Pinout Reference: Which GPIO pins should you use? | Random Nerd Tutorials
The rules are slightly different from the original
Rule ON tele-SI7021#temperature DO Backlog var1 1; RuleTimer1 30; event ctrl_ready=1; event temp_demand=%value% ENDON
ON tele-DS18B20#temperature DO Backlog var1 1; RuleTimer1 70; event ctrl_ready=1; event temp_demand=%value% ENDON
So you are not “resetting the checking timer”
Not sure if that’s the issue but it seems to be important
Regards
Phil K
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Philip Knowles
BTW the explanation of the rule and the code have different values for the Timer1 (70 and 30) and I don’t know which should be the correct value.
Sent from Mail for Windows
From: Fibra
Sent: 03 June 2022 13:04
To: TasmotaUsers
Subject: Simple Thermostat Example not working with DS18B20
Hello everybody,
--
Fibra
ON system#boot DO RuleTimer1 70 ENDON
ON event#toggling1=0 DO mem1 1 ENDON
ON event#toggling1=1 DO mem1 0 ENDON
ON Rules#Timer=1 DO Backlog var1 0; RuleTimer1 70; Power1 0 ENDON
ON event#ctrl_ready>%mem1% DO var1 0 ENDON
ON event#temp_demand>%mem2% DO Power1 0 ENDON
ON event#temp_demand<%mem3% DO Power1 %var1% ENDON
Beside config comands, this is what I have pasted. What bothers me is capital letters. I have read it it not case sensitive, but I know nothing about coding.
Philip Knowles
Right, I’ve had a chance to read the code. RuleTimer1 needs to be higher than TelePeriod so it should be 70 in all cases – if we can get it working I will get the code error fixed.
Just to be absolutely sure can you cut and paste each line into console one line at a time
Rule1 ON system#boot DO RuleTimer1 70 ENDON
Rule1 + ON switch1#state DO Backlog event toggling1=%mem1% ENDON
Rule1 + ON event#toggling1=0 DO mem1 1 ENDON
Rule1 + ON event#toggling1=1 DO mem1 0 ENDON
Rule1 + ON Rules#Timer=1 DO Backlog var1 0; RuleTimer1 70; Power1 0 ENDON
Rule1 + ON tele-DS18B20#temperature DO Backlog var1 1; RuleTimer1 70; event ctrl_ready=1; event temp_demand=%value% ENDON
Rule1 + ON event#ctrl_ready>%mem1% DO var1 0 ENDON
Rule1 + ON event#temp_demand>%mem2% DO Power1 0 ENDON
Rule1 + ON event#temp_demand<%mem3% DO Power1 %var1% ENDON
Backlog SwitchMode1 3; Rule1 1; Rule1 4; TelePeriod 60; SetOption26 1; SetOption0 0; poweronstate 0; mem1 0; mem2 25; mem3 23; var1 0
The key line is
ON tele-DS18B20#temperature DO Backlog var1 1; RuleTimer1 70; event ctrl_ready=1; event temp_demand=%value% ENDON
Which does the following
Sets var1 to 1 (which will be used to turn the power on later if needed)
Restarts the RuleTimer (for 70 seconds)
Run the ctrl_ready event (this checks whether the thermostat is enabled if not sets var1 to 0)
Runs temp_demand event (if the temperature is greater than the high point switches power off – if lower than low point uses var1 to decide if power should be on or not)
However, in the console output you show only the line above runs
ON Rules#Timer=1 DO Backlog var1 0; RuleTimer1 70; Power1 0 ENDON
If it doesn’t work after re-entering the code try this
Rule2 on ds18b20#temperature<30 do power1 1 endon
Rule2 1
Which will simply check that the ds18b20 is being read and turn the power on if the temperature is lower than 30
Good luck
Phil K
To view this discussion on the web, visit https://groups.google.com/d/msgid/sonoffusers/31422fd7-c49d-4fc4-97b0-74e68a185050n%40googlegroups.com.
Fibra
Philip Knowles
Sent: Saturday, June 4, 2022 7:39:46 AM
To: TasmotaUsers <sonof...@googlegroups.com>