Adafruit FONA - Mini Cellular GSM Breakout uFL Version

Compact GSM/GPRS cellular breakout (SIM800 class) supporting voice calls, SMS, and data over 2G networks, with a uFL antenna connector. Requires a SIM card and an external antenna.

Logical pinout · physical placement not verified

Vio
Type · PowerVoltage · 3-5V
VBAT
Type · PowerVoltage · 3.7/4.2V LiPo
GND
Type · GroundVoltage · 0V
Key
Type · ControlVoltage · pulse to GND
RX
Type · UARTVoltage · Vio logic
TX
Type · UARTVoltage · Vio logic
RI
Type · SignalVoltage · logic
SPK+-
Type · GPIOVoltage · differential audio
MIC+-
Type · GPIOVoltage · 2V mic bias
ADC
Type · AnalogVoltage · 0-2.8V max

Pin	Type	Voltage
Vio	Power	3-5V
VBAT	Power	3.7/4.2V LiPo
GND	Ground	0V
Key	Control	pulse to GND
RX	UART	Vio logic
TX	UART	Vio logic
RI	Signal	logic
SPK+-	GPIO	differential audio
MIC+-	GPIO	2V mic bias
ADC	Analog	0-2.8V max

Logical pinout · physical placement not verified

Pin details

10 connections

Vio
PowerVoltage · 3-5V
VBAT
PowerVoltage · 3.7/4.2V LiPo
GND
GroundVoltage · 0V
Key
ControlVoltage · pulse to GND
RX
UARTVoltage · Vio logic
TX
UARTVoltage · Vio logic
RI
SignalVoltage · logic
SPK+-
GPIOVoltage · differential audio
MIC+-
GPIOVoltage · 2V mic bias
ADC
AnalogVoltage · 0-2.8V max

Start wiring

UART · USB · Breakout

Verify supply voltage and logic levels before powering up.

Module pins: GND, RX, TX. Schematik maps them to your board in the app.

Cellular

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