Adafruit FONA - Mini Cellular GSM Breakout - uFL Version - v1

The Adafruit FONA Mini Cellular GSM Breakout (uFL Version) is a compact 1.75 × 1.25-inch cellular module that adds voice, text, SMS, and GPRS data to any microcontroller project. This version features a uFL antenna connector, ideal for slim sticker-type antennas or use with a uFL-to-SMA adapter cable.

Built around the SIM800 quad-band GSM module (850/900/1800/1900 MHz), the FONA works on any global 2G network. It includes LiPo battery charging via Micro-USB, level shifting (2.8–5 V logic), a TRRS headphone jack, vibration motor driver, and an FM radio receiver. It communicates via AT commands over UART with auto baud detection.

Key Features

• SIM800 Quad-Band GSM – 850/900/1800/1900 MHz for global 2G network connectivity
• Voice, SMS, and Data – Make/receive calls, send/receive SMS, GPRS data (TCP/IP, HTTP)
• FM Radio Receiver – Built-in FM broadcast scanning and reception
• uFL Antenna Connector – For slim sticker-type or cable-adapted SMA antennas
• LiPo Battery Charging – On-board charger via Micro-USB with charge status LEDs; requires 500 mAh+ battery
• Level Shifting – Works with 2.8–5 V logic levels
• TRRS Headphone Jack – Standard 4-pole jack for Android/iPhone-compatible headsets
• Speaker + Mic Breakouts – Pads for external 8 Ω speaker and electret microphone
• Vibration Motor Driver – PWM/buzzer output for silent notifications
• Standard SIM Slot – Accepts a 2G mini SIM card
• AT Command Interface – Auto baud detection; controllable via UART from any 3–5 V microcontroller

Also Available

• FONA Mini GSM Breakout – SMA Version
• FONA uFL Starter Pack (with accessories)
• FONA 800 Shield for Arduino
• FONA 808 – GSM + GPS Breakout (with GPS)

Required Accessories (Not Included)

• 2G mini SIM card
• LiPo battery – 500 mAh or larger
• Micro-USB cable for charging
• External uFL GSM antenna (or SMA antenna with uFL-to-SMA adapter)
• Microcontroller with UART (e.g. Arduino)

Ideal For

• Adding cellular connectivity to microcontroller projects
• Voice and SMS-enabled embedded devices
• Remote data logging over GPRS
• IoT prototyping

Package Contents

• 1× Adafruit FONA Mini Cellular GSM Breakout – uFL Version v1