# S2 BLU Programmer

S2 BLU Programmer is used to program the S2 node firmware.

All the nodes after production have the same firmware version CP012-0001-SII-Base, NTYPE 11. There are many different versions of firmware used by different types of sensors. Every node can be reprogrammed over the serial port to use another version of firmware.

A zip with the S2 BLU Programmer and the firmware versions for different types of nodes can be downloaded from: <https://icuscandinavia060.sharepoint.com/:f:/s/Technicalfile/Es5cfsHb5b5CoqTDeLyFvkQBDhg06LBojgCjDtaf24yFHQ?e=Nb07A7>

&#x20;To program the node:

* Unzip the files.
* Double click S2 BLU Programmer to run it.

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* Select the correct COM port.
* Click "Source file" and select the firmware hex file.
* Click "Program".&#x20;
* The programming progress is shown in status line. It takes about 3 seconds. If it is unsuccesful, check the COM port number and the node connections.