M5Stack Dial - ESP32-S3 Smart Rotary Knob with 1.28" Touchscreen

ESP32-S3 embedded board in a rotary-knob form factor with a 1.28-inch round TFT touchscreen, rotary encoder, RFID reader, RTC, buzzer, and a capacitive under-screen button.

Logical pinout · physical placement not verified

USB Type-C
USB Type-C power/data connector. M5Stack documents USB Type-C as a 5 V DC power input for M5Dial.
Type · PowerVoltage · 5V DC input
Rear power terminal +
Rear power terminal positive input for external DC supply. M5Stack documents rear power terminal input as DC 6 to 36 V.
Type · PowerVoltage · 6-36V DC input
Rear power terminal -
Rear power terminal negative/return for the external DC supply.
Type · GroundVoltage · 0V return for 6-36V DC input
Battery connector
Lithium battery expansion interface. M5Stack specifications list battery supply as DC 3.7 V.
Type · PowerVoltage · 3.7V battery
PORT.A GND1
PORT.A HY2.0-4P Grove-style connector ground. PinMap lists PORT.A cable order as black GND, red 5V, yellow G13, white G15.
Type · GroundVoltage · 0V
PORT.A 5V2
PORT.A HY2.0-4P Grove-style connector 5 V supply. PinMap lists PORT.A cable order as black GND, red 5V, yellow G13, white G15.
Type · PowerVoltage · 5V
PORT.A G133
PORT.A signal on ESP32-S3 GPIO13. M5Stack describes PORT.A/PORT.B as reserved expansion interfaces for I2C and GPIO devices.
Type · Signal
PORT.A G154
PORT.A signal on ESP32-S3 GPIO15. M5Stack describes PORT.A/PORT.B as reserved expansion interfaces for I2C and GPIO devices.
Type · Signal
PORT.B GND1
PORT.B HY2.0-4P Grove-style connector ground. PinMap lists PORT.B as GND, 5V, G2, G1.
Type · GroundVoltage · 0V
PORT.B 5V2
PORT.B HY2.0-4P Grove-style connector 5 V supply. PinMap lists PORT.B as GND, 5V, G2, G1.
Type · PowerVoltage · 5V
PORT.B G23
PORT.B signal on ESP32-S3 GPIO2. M5Stack describes PORT.A/PORT.B as reserved expansion interfaces for I2C and GPIO devices.
Type · Signal
PORT.B G14
PORT.B signal on ESP32-S3 GPIO1. M5Stack describes PORT.A/PORT.B as reserved expansion interfaces for I2C and GPIO devices.
Type · Signal
G0
Download-mode button input. M5Stack says to hold the G0 button on the StampS3 before powering on to enter download mode.
Type · Control
RST
Reset/power control button. M5Stack documents pressing RST when no external USB supply is present as a power-off path.
Type · Control

Pin	Position	Type	Function	Voltage
USB Type-C		Power	USB Type-C power/data connector. M5Stack documents USB Type-C as a 5 V DC power input for M5Dial.	5V DC input
Rear power terminal +		Power	Rear power terminal positive input for external DC supply. M5Stack documents rear power terminal input as DC 6 to 36 V.	6-36V DC input
Rear power terminal -		Ground	Rear power terminal negative/return for the external DC supply.	0V return for 6-36V DC input
Battery connector		Power	Lithium battery expansion interface. M5Stack specifications list battery supply as DC 3.7 V.	3.7V battery
PORT.A GND	1	Ground	PORT.A HY2.0-4P Grove-style connector ground. PinMap lists PORT.A cable order as black GND, red 5V, yellow G13, white G15.	0V
PORT.A 5V	2	Power	PORT.A HY2.0-4P Grove-style connector 5 V supply. PinMap lists PORT.A cable order as black GND, red 5V, yellow G13, white G15.	5V
PORT.A G13	3	Signal	PORT.A signal on ESP32-S3 GPIO13. M5Stack describes PORT.A/PORT.B as reserved expansion interfaces for I2C and GPIO devices.
PORT.A G15	4	Signal	PORT.A signal on ESP32-S3 GPIO15. M5Stack describes PORT.A/PORT.B as reserved expansion interfaces for I2C and GPIO devices.
PORT.B GND	1	Ground	PORT.B HY2.0-4P Grove-style connector ground. PinMap lists PORT.B as GND, 5V, G2, G1.	0V
PORT.B 5V	2	Power	PORT.B HY2.0-4P Grove-style connector 5 V supply. PinMap lists PORT.B as GND, 5V, G2, G1.	5V
PORT.B G2	3	Signal	PORT.B signal on ESP32-S3 GPIO2. M5Stack describes PORT.A/PORT.B as reserved expansion interfaces for I2C and GPIO devices.
PORT.B G1	4	Signal	PORT.B signal on ESP32-S3 GPIO1. M5Stack describes PORT.A/PORT.B as reserved expansion interfaces for I2C and GPIO devices.
G0		Control	Download-mode button input. M5Stack says to hold the G0 button on the StampS3 before powering on to enter download mode.
RST		Control	Reset/power control button. M5Stack documents pressing RST when no external USB supply is present as a power-off path.

Logical pinout · physical placement not verified

Pin details

14 connections

USB Type-C
USB Type-C power/data connector. M5Stack documents USB Type-C as a 5 V DC power input for M5Dial.
PowerVoltage · 5V DC input
Rear power terminal +
Rear power terminal positive input for external DC supply. M5Stack documents rear power terminal input as DC 6 to 36 V.
PowerVoltage · 6-36V DC input
Rear power terminal -
Rear power terminal negative/return for the external DC supply.
GroundVoltage · 0V return for 6-36V DC input
Battery connector
Lithium battery expansion interface. M5Stack specifications list battery supply as DC 3.7 V.
PowerVoltage · 3.7V battery
PORT.A GND
PORT.A HY2.0-4P Grove-style connector ground. PinMap lists PORT.A cable order as black GND, red 5V, yellow G13, white G15.
GroundVoltage · 0V
1
PORT.A 5V
PORT.A HY2.0-4P Grove-style connector 5 V supply. PinMap lists PORT.A cable order as black GND, red 5V, yellow G13, white G15.
PowerVoltage · 5V
2
PORT.A G13
PORT.A signal on ESP32-S3 GPIO13. M5Stack describes PORT.A/PORT.B as reserved expansion interfaces for I2C and GPIO devices.
Signal
3
PORT.A G15
PORT.A signal on ESP32-S3 GPIO15. M5Stack describes PORT.A/PORT.B as reserved expansion interfaces for I2C and GPIO devices.
Signal
4
PORT.B GND
PORT.B HY2.0-4P Grove-style connector ground. PinMap lists PORT.B as GND, 5V, G2, G1.
GroundVoltage · 0V
1
PORT.B 5V
PORT.B HY2.0-4P Grove-style connector 5 V supply. PinMap lists PORT.B as GND, 5V, G2, G1.
PowerVoltage · 5V
2
PORT.B G2
PORT.B signal on ESP32-S3 GPIO2. M5Stack describes PORT.A/PORT.B as reserved expansion interfaces for I2C and GPIO devices.
Signal
3
PORT.B G1
PORT.B signal on ESP32-S3 GPIO1. M5Stack describes PORT.A/PORT.B as reserved expansion interfaces for I2C and GPIO devices.
Signal
4
G0
Download-mode button input. M5Stack says to hold the G0 button on the StampS3 before powering on to enter download mode.
Control
RST
Reset/power control button. M5Stack documents pressing RST when no external USB supply is present as a power-off path.
Control

ESP32

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