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macos Flashing Firmware – MacOS MacOS

:::note To check if you have a data cable that will work, plug in your device and then navigate to Apple Menu  > About This Mac > System Report... > Hardware > USB you should see something like CP210X USB to UART Bridge Controller. :::

Download Firmware

Download the latest firmware release. Unzip the file and locate the correct device and region within the list of prebuilt binaries.

Command Line Instructions

OS X comes with Python 2.7 installed, but not pip. The following uses Homebrew to install python3 which includes pip3. On MacOS you will use pip3 instead of pip.

:::note Check if you have Homebrew installed with the following command

brew -v

If it's not installed, follow the instructions on the Homebrew website before continuing. :::

  1. Install Python3
brew install python3
  1. Confirm pip3 was installed alongside python3
pip3 -v
  1. Install esptool
pip3 install --upgrade esptool

:::note You may need to install a driver from Silicon Labs for the CP210X USB to UART bridge :::

  1. Connect your radio to your USB port.
  2. Confirm that your device is talking to your Mac by running the following command in Terminal.
esptool.py chip_id

# You should see a result similar to this:
mydir$ esptool.py chip_id
esptool.py v2.6
Found 2 serial ports
Serial port /dev/ttyUSB0
Connecting....
Detecting chip type... ESP32
Chip is ESP32D0WDQ6 (revision 1)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
MAC: 24:6f:28:b5:36:71
Uploading stub...
Running stub...
Stub running...
Warning: ESP32 has no Chip ID. Reading MAC instead.
MAC: 24:6f:28:b5:36:71
Hard resetting via RTS pin...
  1. cd into the directory where you unzipped the latest release. For example:
cd /Downloads/firmware/
  1. Install the correct firmware for your board with :::caution Be very careful to install the correct load for your board. In particular the popular 'T-BEAM' radio from TTGO is not called 'TTGO-Lora' (that is a different board). So don't install the 'TTGO-Lora' build on a TBEAM, it won't work correctly. :::
./device-install.sh -f firmware-BOARD-VERSION.bin

./device-install.sh -f firmware-heltec-EU865-1.2.0.bin
  1. To update a the firmware on an existing Meshtastic device, run
./device-update.sh -f firmware-BOARD-VERSION.bin

./device-update.sh -f firmware-heltec-EU865-1.2.0.bin

Graphical User Interface Instructions

:::note ESPHome Flasher also provides instructions to build from source or install via pip on their README. :::

  1. Download ESPHome Flasher

  2. Connect your radio to your USB port.

  3. Open ESPHome Flasher. There should be no installation required. :::note If you get an error saying The application "ESPHome-Flasher.app" can't be opened it is likely a permissions issue. See here for instructions. ::: :::note If you get an error saying "ESPHome-Flasher.app" cannot be opened because the developer cannot be verified, click cancel. Right click on the application and select Open. Select Open on the confirmation alert. :::

  4. If your board is not showing under Serial Port then you may need to install the drivers for the CP210X USB to UART bridge.

  5. In ESPHome Flasher, refresh the serial ports and select the port to which your board is connected.

  6. Browse to the previously downloaded firmware and select the correct firmware based on the board type.

  7. Select Flash ESP.

  8. Once complete, “Done! Flashing is complete!” will be shown.