[Solved] Identifying GND, 3.3V, TX, RX Pins on Tomzn TOB9P-VAP 63A WiFi Relay (Sept 2024 Model)

I recently purchased (September 2024) a Tomzn TOB9-VAP which is a 63A (1U din mountable) wifi relay with VA protection and metering.

I purchased it under the assumption that I was going to flash it (via cable) using the information shared in this post https://www.elektroda.com/rtvforum/topic4000770.html#20853888 but it appears that the number of pins on the main chip has changed and I'm not sure what the pinouts are now (I'm a programmer who is quite inexperienced with electronics)

Can anyone help me to understand which are the GND, 3.3V, TX and RX pins on the chip?

Not sure I see what the differences are. Your device still has a CBU module

>>21228643
@divadiow thanks for that! The schematics I had seen previously showed a CBU with 24 pinouts.

https://templates.blakadder.com/tomzn_TOB8-63WiFi.html

And in my haste I had miscounted the ones in the image on the post I previously referenced. Do you mind sharing a link to where you found the schematic you shared?

it's all good. The official Tuya page is here https://developer.tuya.com/en/docs/iot/cbu-module-datasheet?id=Ka07pykl5dk4u

but I tend to google for "cbu module" to get that specific image because oddly that link doesn't include the image that when Googling then links to that article, if that makes sense.

Thank you again!

Solved