ESP32 relay X2

ESPHome
1

I’m trying to get this thing going going, but ESP home wont connect to it, I have a ftd1232 connected to it like this (pictures attached):

FTD1232 ESP32 relayX2
TX RX
RX TX
VCC VCC

but ESP home hangs on the connecting screen… I’m holding the IO0 button, then pressing and releasing EN, and then relasing IO0… but nothing happens… tried doign that sequenve before connecting the FTD1232 to the computer, and every combination i can think of, I’ve also changed cables and checked for continuity and it’s all good… only think i can think of is a bad board? am I missing something?

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2

Where’s ground?
Also make sure the FTD is set to 3.3V

1 Like
3

Did u try to reverse TX and RX between FDTI adapter and ESP ? depending of devices you have to wire RX and TX straight or crossed (no risk if it’s in wrong way out of not communicating !)

4

His image shows three wires: Rx, Tx and Vcc. No ground connection.

5

didn’t notice but yeah very good point ! might have damaged the ESP if wired and powered without ground…

6

I just checked… the ftd was set to 5V, and i powered the ESP on it’s own using a power supply to the 5V in and the relays started clicking like crazy, I’m guessing this board is toast… oh well, we live we learn, thanks!!

7

Unlikely. If he DID have ground connected and the FTDI set to 5V, then bye-bye ESP32.

8

I have used a few of these boards and I have always connected a GND, RX and TX and left Vcc on the FTDI unconnected. The board then needs to be powered externally. None of my FTDI have enough power for the relays.

Unlikely to be damaged in my opinion.

9

You were right! Thanks!