Home › Forums › UM7 Product Support › firmware update
This topic contains 5 replies, has 2 voices, and was last updated by 
LiSaN 2 months, 1 week ago.
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can anyone exlpain step by step how I can update the firmware of the um7 ?
I also got its expansion board.
I downloaded the new version(U71D) and I tried to upload it to sensor via chr serial interface and software connects to sensor but when I tried to upload firmware its disconnect and gives “device unavailable. is the bootlader activated” I used commands menu “get firmware revision” but nothing changes. -
To update the firmware, use the following steps:
1) Download the newest firmware HEX file from here: http://www.chrobotics.com/shop/um7-orientation-sensor
2) Make sure you have the latest version of the Serial Interface, available here: http://www.chrobotics.com/serial-interface
3) Connect the BOOT pin on the UM7 to the 3.3V pin before applying power.
4) Power up you UM7. The LED should *not turn on. This means that the bootloader started in programming mode.
5) Make sure that your UM7 is appropriately connected to your computer. The USB Expansion Board is a good way to do so.
6) Open the Serial Interface and select the correct COM port. Do NOT click “Connect.” Select the firmware HEX file you downloaded in step 1 and click “Program.” It should flash the new firmware. Once it finishes, disconnect the BOOT pin and cycle power. You are finished! -
Mr. Caleb
I didnt exactly understand how I can do the “3) Connect the BOOT pin on the UM7 to the 3.3V pin before applying power.”
could you please show it with an image coz I dont want to do anything wrong to my sensor that can damage it. (I got USB Expansion Board )
thanx for your help -
no help? just a sketch is also enough…
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There is a pinout diagram on page 12 of the UM7 datasheet, available here: http://www.chrobotics.com/docs/UM7_Datasheet.pdf
Connect the pin labeled BT0 to the pin labeled 3.3V, on the bottom-right connector shown in the diagram.
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thank you so much.
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