Upgrade CRSF-SBUS via A or B
A. USB-TTL modules, such as CP210x, FTDI
1. Wiring
- TX1 — USB-TTL module RX
- RX1 — USB-TTL module TX
- 5V — USB-TTL module 5V
- G — USB-TTL module GND
2. Bridge the jumper pad at bottom side with a drop of tin, or bridge it with tips of tweezer when powering on.
3. Connect USB-TTL module to PC,
Blue LED on CRSF-SBUS board will blink fast, it means CRSF-SBUS board is working in boot mode.
now you can remove the jumper or remove it after flashing.
4. Open Matek configurator, Select COM port of USB-TTL, Baud rate 115200, Click “Connect”
5. OpenFile “crsf_sbus_vx.x.x.bin”
6. Click “Upgrade”
7. After update, remove the jumper.
B. INAV/BF serial passthrough
1. Wiring
- TX1 — FC any spare UART_RX
- RX1 — FC any spare UART_TX
- 5V — FC 5V or 4V5
- G — FC GND
2. Bridge the jumper pad at bottom side with a drop of tin, or bridge it with tips of tweezer when powering on.
3. Connect FC USB to PC
Blue LED on CRSF-SBUS board will blink fast, it means CRSF-SBUS board is working in boot mode.
now you can remove the jumper or remove it after flashing.
4. open INAV/BF configurator, connect FC to configurator
5. click INAV/BF configurator “CLI” tab, type “serialpassthrough x 115200”, x = UART number -1, e.g. CRSF-SBUS board connect to FC UART4, type “serialpassthrough 3 115200”.
6. Disconnect FC from configurator, make sure USB is still plugged in FC and LED on CRSF-SBUS board is still blinking fast.
7. Open Matek configurator, Select COM port of Flight controler, Baud rate 115200, Click “Connect”
8. OpenFile “crsf_sbus_vx.x.x.bin”
9. Click “Upgrade”
10. After update, remove the jumper.
