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UART device

SIM800L GSM

The SIM800L GSM is a UART device in the LabWired part catalog. Its catalog type is sim800l. It connects to the MCU over UART. The catalog gives a supply range of 3.4–4.4 V. It has 5 pins. A registered peripheral model runs in the engine: the firmware talks to it over the real bus and gets device-accurate responses.

From the catalog: UART AT command shell (OK); cellular air link not modelled.

Key facts

CategoryUART devices
Catalog typesim800l
InterfaceUART
Supply range3.4–4.4 V
Pins5
DatasheetSIMCom SIM800L hardware design

What LabWired simulates

What is simulated

Simulated device model

How it was validated

Built from the datasheet. Implemented from the part’s register documentation and exercised by automated tests. Nothing physical was ever placed next to it.

SIM800L GSM pinout

PinElectrical typeFunction
VCC Power input Supply
GND Power input Supply
TX Output UART transmit (TX)
RX Input UART receive (RX)
RST Input GPIO

How to simulate the SIM800L GSM in LabWired

  1. Open the Playground at app.labwired.com and place an MCU board.
  2. Add the SIM800L GSM (catalog type sim800l).
  3. Connect VCC and GND to the supply and ground of the board. Use a supply inside the catalog range of 3.4–4.4 V.
  4. Cross the UART lines: connect TX to the RX pin of the board, and RX to the TX pin of the board.
  5. Connect RST to a free GPIO pin.
  6. Run the firmware. It sends and receives bytes on the simulated UART as on hardware.

Related UART devices

All UART devices · All parts

Modelled from SIMCom SIM800L hardware design.

Wire it up in Playground → See the full validation matrix