Search found 641 matches

by kevinkk525
Mon Mar 30, 2020 1:34 pm
Forum: ESP32 boards
Topic: DS18B20 readings are wrong
Replies: 5
Views: 35

Re: DS18B20 readings are wrong

That is exactly what I do. Measure individual sensor offset and then add the offset to all sensor readings. Other than that I didn't notice any malfunctions. Use one sensor in my "greenhouse" to read the water temperature of my nutrient solution. Sensor still works fine. Going to use 2 sensors this ...
by kevinkk525
Mon Mar 30, 2020 1:07 pm
Forum: ESP32 boards
Topic: DS18B20 readings are wrong
Replies: 5
Views: 35

Re: DS18B20 readings are wrong

Since you bought them from Aliexpress (like I did), they are most likely cheap clones. Some of those have that kind of offset. I also have multiple DS18B20s that show a temperature offset from each other but otherwise a very similar temperature curve. I ended up accepting the fact that the chinese s...
by kevinkk525
Sun Mar 29, 2020 8:06 pm
Forum: ESP8266 boards
Topic: ESP8266 does not connect to MQTT server anymore, ESP32 does, since new WiFi cablemodem is installed
Replies: 20
Views: 1306

Re: ESP8266 does not connect to MQTT server anymore, ESP32 does, since new WiFi cablemodem is installed

Yeah.. Well I guess we would all appreciate if you implement WPA (AES) for the esp8266 :D

But as tve said, it'd be easier to buy a proper router instead of that vodafone box. I'm also using cable internet with vodafone but I'm renting a FritzBox for all functionality.
by kevinkk525
Sun Mar 29, 2020 1:08 pm
Forum: ESP8266 boards
Topic: ESP8266 does not connect to MQTT server anymore, ESP32 does, since new WiFi cablemodem is installed
Replies: 20
Views: 1306

Re: ESP8266 does not connect to MQTT server anymore, ESP32 does, since new WiFi cablemodem is installed

Ah well the enterprise one could indeed be the cause of the problem. I remember reading somewhere about it not being completely/correctly implemented but can't point you anywhere.
Is changing the wifi encryption not possible with your new router?
by kevinkk525
Sat Mar 28, 2020 1:49 pm
Forum: Programs, Libraries and Tools
Topic: uasyncio - StreamReader not found ?
Replies: 7
Views: 131

Re: uasyncio - StreamReader not found ?

To be honest, I am not using StreamReader at the moment, so I can't comment on that. But in this thread there is a similar question: viewtopic.php?f=15&t=7925
And Peter Hinch will probably answer that, he knows more about Streams and IO than I do.
by kevinkk525
Fri Mar 27, 2020 2:11 pm
Forum: Programs, Libraries and Tools
Topic: uasyncio - StreamReader not found ?
Replies: 7
Views: 131

Re: uasyncio - StreamReader not found ?

I suggest using the current daily build of micropython. This includes the new version of uasyncio that can also be found in the docs: https://docs.micropython.org/en/latest/library/uasyncio.html It is still young (got merged a few days ago) and might still contain some bugs, but so does the old vers...
by kevinkk525
Fri Mar 27, 2020 7:33 am
Forum: ESP32 boards
Topic: ESP32 ADC voltage drop after some hours
Replies: 9
Views: 192

Re: ESP32 ADC voltage drop after some hours

I did some measurements on the DAC which showed errors of up to 3.3% so I can't say I'm surprised. For accurate measurements you need quality hardware. A Pyboard ;) Yeah I know the ESP32 is shitty hardware for precision work :lol: However, after calibration it is quite accurate. I can hook up a 300...
by kevinkk525
Fri Mar 27, 2020 7:28 am
Forum: General Discussion and Questions
Topic: MQTT help using ESP32
Replies: 9
Views: 220

Re: MQTT help using ESP32

So the code you posted is indeed what you have in your source file..

Well look again closely, you should easily find the syntax error.. hint: indentation
by kevinkk525
Fri Mar 27, 2020 6:45 am
Forum: ESP32 boards
Topic: ESP32 ADC voltage drop after some hours
Replies: 9
Views: 192

Re: ESP32 ADC voltage drop after some hours

So I let it run through the night with a voltage divider of 470R and 300R. The voltage didn't change. Temperature in the room changed from 22C to 17C and back to 20C right now. Voltage was always stable. So at least for this temperature range the ADC works reliable. It also confirms that the ADC gen...