MicroPython Forum

Thank you valuable response. I intend to use ESP32 with sensors and relay switch conected to it. Micropyhon as SW. Node Red to check temp every 10min and, if below threshold, Node Red sends mqtt to switch on heater for 5 min. Intend to test prior bringing plants, as I do have monitoring of temp alre...

I intend to use KY-019 5V One 1 Channel Relay Module to switch on and off 2KW air heater. This is supposed to run during night, when sensors in my greenhouse would indicated that temp is below set threshold. It says it can handle up to 250V 10A, so seem to be not exceeding capabilities, but rather c...

Good point, but I have too many available inputs on ESP32, so thought will be easier to control and code it

I have made drawing for intended new PCB that will hold several sensors to monitor temperature at various locations of greenhouse and one switch that will control heater (when temperature drops below set during the night). I would appreciate your comments, suggestions on Additional elements like cap...

Thanks, I do have basic understanding from school, just like you described: (Like what is a resistor, what is a capacitor? Basic laws, like U = R * I and stuff like that?). I did also soldered several projects, but only following predefined set of components and layout. I have read about Fritzing an...

I know this is not direct Micropython question, but related. I do not have knowledge about PCB layout build up. I follow instructions I find online, add capacitors, resistors or other elements as described. However I do not have understanding why do we need them and if I can use element with slightl...

I am using Micropython on ESP32 board that has few sensors connected. The task for ESP32 is to read sensors and send data to MQTT server. I got it all working, however process used do stop unexpectedly. Sometimes it happens once a week, sometimes it kept stable for few weeks. I was only guessing tha...

Not sure I follow your solution... boot.py should remain unchanged on ESP32 board. Were are you renaming it and why?

Ok, so we established that -total power supply should not be a problem; -I would prefer to use one power supply in this project; -I should use transistor or relay to supply current to pump and use ESP32 to just control that transistor or relay -Power output from any ESP32 pin is not sufficient to dr...

Ok, last few questions on this subject. If I have separate power supply for my pump, I can just use simple switch to operate it. Switch would be controlled by ESP32, but current through out pins would be from external source. i am suggesting this as I used switches in past, transistors only based on...