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Dec 5, 2023
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Wire hardware exceptions #948

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cb76050
Added table for boards
BenjaminDannegard Nov 30, 2023
b603600
Update Language/Functions/Communication/Wire.adoc
karlsoderby Dec 5, 2023
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26 changes: 12 additions & 14 deletions Language/Functions/Communication/Wire.adoc
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Expand Up @@ -20,20 +20,18 @@ This library allows you to communicate with I2C/TWI devices. On the Arduino boar

As a reference the table below shows where TWI pins are located on various Arduino boards.

[cols="1,1"]
|===
|Board
|I2C/TWI pins

|UNO, Ethernet
|A4 (SDA), A5 (SCL)

|Mega2560
|20 (SDA), 21 (SCL)

|Leonardo
|20 (SDA), 21 (SCL), SDA1, SCL1
|===
|================================================================================================================================================
| Board | I2C Default | I2C1 | I2C2 | Notes
| UNO R3, UNO R3 SMD, UNO Mini Ltd | A4(SDA), A5(SCL) | | | I2C also available on the SDA / SCL pins (digital header).
| UNO R4 Minima, UNO R4 WiFi | A4(SDA), A5(SCL) | Qwiic: D27(SDA), D26(SCL) | | I2C also available on the SDA / SCL pins (digital header).
| UNO WiFi Rev2, Zero | 20(SDA), 21(SCL) | | |
| Leonardo, Micro, Yùn Rev2 | D2(SDA), D3(SCL) | | |
| Nano boards | A4(SDA), A5(SCL) | | |
| MKR boards | D11(SDA), D12(SCL) | | |
| GIGA R1 WiFi | 20(SDA), 21(SCL) | D102(SDA1), D101 (SCL1) | D9(SDA2), D8 (SCL2) | Use `Wire1.begin()` for I2C1, and `Wire2.begin()` for I2C2.
| Due | 20(SDA), 21(SCL) | D70(SDA1), D71(SCL1) | | Use `Wire1.begin()` for I2C1
| Mega 2560 Rev3 | D20(SDA), D21(SCL) | | |
|================================================================================================================================================


This library inherits from the Stream functions, making it consistent with other read/write libraries. Because of this, `send()` and `receive()` have been replaced with `read()` and `write()`.
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