Re: Digest for sonoffusers@googlegroups.com - 3 updates in 1 topic

[Bryan Bradford]

I ran into the same problem a while back. You need to tie the two power supply grounds together.

On Mon, May 18, 2026, 1:05 a.m. <sonof...@googlegroups.com> wrote:

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• powering an esp32ue dev board, - 3 Updates

powering an esp32ue dev board,

joel gerardi <joelg...@gmail.com>: May 17 09:37AM -0700 I have a esp32ue dev kit on a breakout board I need to control 4 relays. The relay board i am using has a 115 to 5vDC transformer on it. (https://www.amazon.com/dp/B077YLQ6DL?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_19) When i use this to power the esp32, and set the configuration as follows i get extremely erratic behavior. It works fine, then just starts clicking and then resets the tasmota back to its defaults. I have tried many different configurations and it is always the same result. [image: Screenshot 2026-05-17 at 12.31.46 PM.png]   If i power the esp with usb using the same configuration as above, and use a relay board that has no transformer, all works fine. I am running two relays with one gpio because it will be controlling a two pole circut. I would like to use and onboard transformer as it makes the enite hookup simpler for me. Can anyone help me out with what is happening here?     I would like to

Bart van Seters <bartvans...@gmail.com>: May 17 09:30PM +0200 A transformer converts AC to AC. You need a powersupply input 115V and output 5V DC

joel gerardi <joelg...@gmail.com>: May 17 01:34PM -0700 I stand corrected. This 4 channel relay i am trying to use has an onboard power supply. Input is 115v AC, output is 5v DC   On Sunday, May 17, 2026 at 3:31:20 PM UTC-4 BartSr wrote:

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