I am trying to use 4 dht22 sensors with an esp32 and I keep experiencing these crashes. The program will run fine for 15-40mins and then the microcontroller will reset itself. It seems to have something to do with reading the sensor data but im a noob and i'm struggling to figure it out. Does anyone…

@jaywhy Hey there, Can you please post the whole sketch you´re using? When you see the error core paniced, there´s something wrong with the coding or wiring but mostly coding or an indefintive loop. Maybe I can test the code with 2 dht22´s.

Never used this sensor, but Google tells me that the min sample time of these sensors is two seconds (0.5Hz). It seems you're reading the sensors multiple (NUM_SLOTS) times after each other, without that 2-second break. Leo..

I appreciate the offer. My code is at least 1000 lines long and is broken up amongst multiple tabs. I leave for work soon but I can reformat it and post tonight. According to the stack trace, it seems to be something to do with reading the sensors and that only happens once in the sketch. Yesterda…

in my little experience with espressif I see they tend to crash sometimes with certain power supply ...

Wouldn't it be that each individual sensor needs a 2sec interval? NUM_SLOTS = 4 because there are 4 sensors in the array. The code should: only after the 5 second interval has passed read temp from sensor0 read hum from sensor0 read temp from sensor1 read hum from sensor1 read temp from sens…

Have you got a pull up resistor on the data line of each sensor? (I've had problems with DHT sensors if there isn't)

@jaywhy indeed like @timinelmira said, you need a resistor for each sensor. In the image I only see one.

I didnt. I tried 10k resistors when i first got them and they would all read NAN. I just tried some 5.1k and they are returning actual values. Will leave running for a while and see what happens. If i have no luck then i will start reformatting my code to post

Hi, @jaywhy [image] jaywhy: If i have no luck then i will start reformatting my code to post If you have no luck, write some code to JUST read the DHTs, and see if the problem occurs. Lets prove your hardware before butchering your code. Did you write your code in stages, and test each ti…

Check your library and wiring. I had a similar problem with an esp8266 and it turned out the library I was using was waiting for data that never came. The data wire was loose so no data, which eventually caused a wdt timeout.

DHT22 reading crashes ESP32

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barshatriplee August 14, 2023, 3:39pm 12

Here is another thread about the Guru meditation error: Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled - #7 by cotestatnt

Check your wiring and try another library.

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DHT22 reading crashes ESP32

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