Teardown: Broadlink RM Mini 3

You might have read already, that I don’t like the Broadlink products as they do not offer any open APIs. But maybe, they are at least hackable?

Let’s check the RM Mini 3 Infrared sender/receiver.

Taking of the cap shows us the infrared LEDs and a single IR receiver:

rm3-1

This is what I would have expected. Are there any surprises on the main board?

rm3-2

Not really. The main processor is an Marvel 88MC200. This is a simple Cortex M3 based micro-controller that is clocked at 200 MHz. There is no need for a more powerful processor in this device. As it doesn’t have a WiFi controller integrated, there is a┬ásecond controller on the board: the 88W8801 is a Marvel WiFi chip.

While in theory it might be possible to upload a different software onto the system, it will be quite complicated. You don’t want to fiddle around multiple days to re-use a 20$ device? The easiest way to re-use it is removing the whole controller, replace it with an ESP8266 and put your own firmware onto it. However, for this you don’t need to buy this device first. You can just directly connect some IR LEDs to an ESP8266 chip. This will be cheaper than the RM Mini 3.