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Electronics => Projects, Designs, and Technical Stuff => Topic started by: ledtester on August 15, 2023, 03:14:27 pm

Title: Do you have an Etekcity ZAP 433 Mhz 10-BH9938U Outlet Switch?
Post by: ledtester on August 15, 2023, 03:14:27 pm
I have a couple of receiver modules but no remote. If you have a remote I'd like to get the code timing data so I can build my own remote from a 433 Mhz transmitter module.

From what I can tell the ZAP modules were introduced around 2015. The button on the side is a programming switch which allows it to learn a code from a remote. I tried teaching it the code from a 433 MHz outlet switch remote made by another manufacturer but it didn't seem to work.

This page describes how the timing data can be recorded from a 433 receiver module and a USB logic analyzer:

https://www.hackster.io/chuygen/hacking-a-433mhz-rf-power-socket-3930d6 (https://www.hackster.io/chuygen/hacking-a-433mhz-rf-power-socket-3930d6)

The other wireless outlet switch system I have uses the following protocol:

attention signal: 160us HIGH followed by 5340us LOW
a "1" bit: 160us HIGH followed by 530us LOW
a "0" bit: 530us HIGH followed by 160us LOW

The transmitted code is 24 bits and looks like this:

Code: [Select]
           ON       OFF
  SW 1: 0x4ee2f3  0x4ee2fb
  SW 2: 0x4ee2f5  0x4ee2fd
  SW 3: 0x4ee2f6  0x4ee2fe
  SW 4: 0x4ee2f2  0x4ee2fa
  SW 5: 0x4ee2f4  0x4ee2fc

A 690us bit period seems to be fairly common but not universal among these kinds of systems.

Anyway, if someone has a ZAP remote I would really appreciate getting the timing data for the codes.

Thanks!

PS. I wonder if the sticker on the module (the 0329-4) is related to the codes the unit responds to.