GB Sound speed controller SFR-1
06.02.2019 BEIER-Electronic 93
Firmware update
The sound-Teacher writes the firmware file automatically while saving the project
data onto SD card.
A firmware update of the SFR-1 is always performed automatically when the Sound-
Teacher version is different from the current version of the SFR-1 firmware. The
firmware update will be started after the supply voltage is switched on and it takes 10
seconds. The red and blue LEDs flashes during this period a few times alternating.
Never disconnect the sound module from power supply while updating!
A new firmware is mostly included if you are using a new version of the Sound-
Teacher. If you are using a new version of the Sound-Teacher, take care that on the
first turning on of your sound module, the firmware might be updated. Therefore the
voltage should not be turned off for at least 10 seconds!
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