Sciotronics
Mecha Comet
microbots io
Sparkfun micromod
Adafruit Stemma
Arduino Modulino
| Controller/Device | STEMMA | STEMMA QT | Grove | Qwiic | Gravity |
| Connector | JST PH 3 or 4 Pin (2.0mm pitch) | JST SH 4 Pin (1.0mm pitch) | Proprietary 4 Pin (2.0mm pitch) | JST SH 4 Pin (1.0mm pitch) | JST PH 3 or 4 Pin (2.0mm pitch) |
| Power Pin Voltage | 3-5V DC | 3-5V DC | 3-5VDC | 3V DC | 3-5V DC |
| Logic Pins Voltage | 3-5V DC | 3-5V DC | 3-5V DC | 3V DC | 3-5V DC |
| Data Protocol | I2C only on 4 pin. Analog/Digital/PWM on 3 pin. | I2C only | I2C/Analog/Digital/PWM on 4 pin | I2C only | I2C or UART on 4 pin. Analog/Digital/PWM on 3 pin. |