If you've just retrieved an RS41 radiosonde and wonder how to get started with flashing it with your own code then this page is for you.
stopping the transmitter
When an RS41 is launched it holds 2x AA batteries that will keep the radiosonde transmitting for about 6 hours. The simplest way to stop the RS41 from transmitting is to press the on/off button briefly. The button is located under the sticker with the serial number, but just press it until the LED turns off.
open the case
Pry open the two plastic tabs on the top and bottom to separate the two styrofoam halves that encapsulates the RS41 circuit board.
Connecting to the RS41 programming header
If you have a 2mm-pitch 2x5 IDC connector laying around you can use that, but most people will just have to solder four wires to the programming header.
____________________ ____________________| (circuit board) | 2 4 6 8 10 | | 1 3 5 7 9 | (programming connector) +------------+ pin 1 2 3 4 5 6 7 8 9 10