Re: ESP-01 resets when switching relay board
Posted: Fri Mar 27, 2015 1:03 pm
I did some more testing today with the ESP-12 and determined if you solder a 100nf 0603 capacitor from the castellated 'rest' pad to the ESP12 shield can, all the resets go away! This includes seeing no reset events when test leads or scope probes are attached.
I have a test command in my firmware which allows the relay to be cycled at a user selectable rate. I used this along with a CFL lamp load to test for resets.
Additionally, the 12V chinese power supply module now is now working when powered off of the same AC leads used for the load. Previous tests with the Chinese power module without the 100nf cap on the reset line produced resets within 10 cycles of the relay test command.
So far I've run hundreds of cycles with the capacitor mod, and have not seen any resets.
This seems to indicate there's no noise filtering on the 'rest' signal in in the module or inside of the chip.
I have a test command in my firmware which allows the relay to be cycled at a user selectable rate. I used this along with a CFL lamp load to test for resets.
Additionally, the 12V chinese power supply module now is now working when powered off of the same AC leads used for the load. Previous tests with the Chinese power module without the 100nf cap on the reset line produced resets within 10 cycles of the relay test command.
So far I've run hundreds of cycles with the capacitor mod, and have not seen any resets.
This seems to indicate there's no noise filtering on the 'rest' signal in in the module or inside of the chip.