I recently encountered some issues with my DHT22 temperature and humidity sensors connected to an ESP32. The sensors were freezing and throwing errors, specifically ‘Invalid readings! Please check your wiring (pull-up resistor, pin number)’. I tried using a lambda expression with the on_value function to prevent sending invalid readings to HomeAssistant, but unfortunately, the ESP32 crashed. Here’s the code I attempted:
yaml
- platform: dht
model: DHT22_TYPE2
pin: GPIO19
temperature:
name: “Temperatura ${name}”
id: dht22_t1
on_value:
lambda: |-
if (!(isnan(x))) {
id(dht22_t1).publish_state(x);
}
humidity:
name: “Umidita ${name}”
id: dht22_h1
update_interval: 120s
After some research and troubleshooting, I discovered that the issue might be related to the pull-up resistor configuration or the pin setup. I decided to recheck my wiring and ensure that the pull-up resistors were correctly placed. Additionally, I tested the sensors individually to isolate the problem.
Meanwhile, I also faced challenges with the MyUplink binding for my Alpha Innotec heat pump. The binding stopped processing data points after the first few queries, leaving some channels unmapped. The debug logs showed that the JSON data was valid, but the mapping process halted at a specific data point. I reached out to the community for insights and considered whether the issue might be related to the API rate limits or data parsing errors.
Through these experiences, I learned the importance of meticulous wiring checks and the value of community support in troubleshooting. I’m now looking forward to resolving these issues and ensuring smooth operation of my sensors and bindings. If anyone has encountered similar problems or has solutions to share, I’d love to hear your thoughts!