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**NOTE: This is currently under development. This page might be wrong or change quickly.**
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## Pinout
| Pin Number | Function | Notes |
|:---:|:---:| ---|
| 1 | Ground | Connect to chassis ground |
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| 2 | LSU Ip | Connect to sensor pin 1 |
| 3 | LSU Heater - | Connect to sensor pin 3 |
| 4 | LSU Heater + | Connect to sensor pin 4 |
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| 5 | No connection | |
| 6 | 12v Supply | Connect to fuel pump supply or independent relay controlled by ECU |
| 7 | No connection | |
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| 8 | LSU Vm | Connect to sensor pin 2 |
| 9 | LSU Rtrim | Connect to sensor pin 5 |
| 10 | LSU Un | Connect to sensor pin 6 |
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| 11 | CAN H | CAN bus high |
| 12 | CAN L | CAN bus low |
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## LED decoding
| Blue LED | Green LED | Meaning |
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|:--------:|:---------:| -----|
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| off | fast flash | sensor warming up |
| off | slow flash | Sensor hot, operating normally |
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| flashing | off | See error code table below |
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| alternating | alternating | Bootloader, see below |
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## Firmware Update
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rusEFI own wideband module requires one time initial programming. Self contained version of the board relies on custom USB header while module integrated into Hellen requires usage of ST-Link programmer hardware via TC2030 or breakout SWD pins.
initial programming binary at https://github.com/mck1117/wideband/tree/master/for_rusefi
At the moment only known to work using stm32cube software not ST Link utility (weird). In case of Hellen 5v via USB is required.
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## Error Codes
Green LED off and blue LED flashing indicates an error. The blue LED will blink a certain number of times, with a 2 second pause, then repeats.
| Blinks | Meaning |
| --- |:--- |
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| 3 | Sensor failed to heat up within 30 seconds |
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| 4 | Sensor overheated after entering closed loop mode |
| 5 | Sensor unexpectedly cold after entering closed loop mode (bad wiring?) |
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### Bootloader LED Codes
| Blink pattern | Meaning |
| --- |:--- |
| alternating slowly | Firmware integrity check failed, please retry firmware upgrade. |
| alternating quickly | Waiting for bootloader entry command, only occurs for ~1 second before launching firmware |
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## Source Code
[The hardware and software source code are hosted here. ](https://github.com/mck1117/wideband )
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## Index Selection
https://github.com/mck1117/wideband/issues/11
