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This module converts power supply voltage and signal voltage such as I2C, UART, etc.
It has Grove-compatible and Qwiic-compatible connectors.
It allows bidirectional connection of 3.3V system and 5V system.
It supports the following 4 voltage conversion patterns.
| Pattern | Master side | Slave side | Example | ||
|---|---|---|---|---|---|
| Power | Signal | Power | Signal | ||
| ① | 5V | 5V | 3.3V | 3.3V | Arduino Uno → Qwiic Module |
| ② | 5V | 3.3V | 3.3V | 3.3V | M5Stack Core2 → Qwiic Module |
| ③ | 3.3V | 3.3V | 5V | 3.3V | Raspberry Pi → M5Stack Unit |
| ④ | 3.3V | 3.3V | 5V | 5V | Raspberry Pi → Grove Module(5V) |

Connect the master and slave devices by setting jumper caps for each pattern of power supply and signal voltages on the master and slave sides as shown below.
| Pattern | Master side | Slave side | Jumper | Image | |||
|---|---|---|---|---|---|---|---|
| Power | Signal | Power | Signal | J4・J5 | J9 | ||
| ① | 5V | 5V | 3.3V | 3.3V | 5V->3V3 |
5V |
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| ② | 5V | 3.3V | 3.3V | 3.3V | 5V->3V3 |
3V3 |
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| ③ | 3.3V | 3.3V | 5V | 3.3V | 3V3->5V |
3V3 |
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| ④ | 3.3V | 3.3V | 5V | 5V | 3V3->5V |
5V |
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