The board provides an electrically isolated way of taking to the console of a PI Zero or RPI via the RS232 connectors at 1Mb/s (115.5KBd) using the Avago R-2524z and T-1524Z fibre receiver, transmitter pair.
Board Connectors
Power
1 – 0V
2 – 5V
3 – 3V-5V (uP supply)
Data
1 – 0V
2 – Data to Transmit – TX
3 – Data Received – RX
Fibre
1mm shielded fibre using the Avago Versatile Connectors.
The board will needs to be supplied with 5V at around 50mA, But it will accept data to and from 3V -5V systems by supplying the correct voltage on pin 3 of the power connector.
The board isn’t baud rate specific and should work at any baud rate from 300bd to 115.5Kbd (1Mb/s)
Connection to a RPI or PiZero
| RS232 Board | RPI / PI Zero GPIO header |
| Power 1 | 0V – pin6 |
| Power 2 | 5V – pin2 |
| Power 3 | 3.3V – pin1 |
| Data 1 | 0V (not needed) |
| Data 2 | TX – pin 8 |
| Data 3 | RX – pin 10 |
Circuit Diagram.
PCB
Warning V1 boards have power and data connectors reversed, and they need a wire from pin 1 to pin 4 of the R-2524. Both these Issues are fixed on the V2.(coming soon)
V1 Bodge
PCB’s available on OSHPARK
Of course for a full PC to PI link, you will need two of these boards, and a USB to RS232 adapter
See Also…