Hi and welcome

 

My name is Ohan Smit a radio amateur from Cape Town South Africa with the call sign ZS1SCI.

 

My friend recently found an iMet-54 weather balloon that landed on his farm.

He sent me the following picture picture 

4dd09110-fab8-4704-ab7d-36ded9e4ae8c.jpg

I was naturally intrigued by this discovery.

So assuming he would only bring the RF unit, I was very surprised when he bought the whole kit, parachute, balloon, string loom the works.

 

I've in the meanwhile tried to reverse engineer the balloon, I got GPS messages, and everything was looking peachy.

 

Then I accidentally fried the MCU by hooking up a cheap logic analyzer. 

 

My goal had now become to try and simulate its behaviour like before it broke, using the same MCU and transmission chip as the original PCB.

 

The L76 GPS chip is still in working order.