Teapotlabs BWLR1E Programmer is a device to support programming Teapotlabs BWLR1E without soldering to the device. The programmer interface to the device program pad via pogo-pins.

See GitHub source for more detail description.

Specification

• CH340E USB to UART Bridge for Teapotlabs BWLR1E Programming
• 1A Charge rate to Teapotlabs BWLR1E battery
• Pogo-pin to interface to Teapotlabs BWLR1E. Connects the following pin:
• RXD2
• TXD2
• SWDIO
• SWCLK
• RST
• BOOT
• LIPO+
• On-board boot and reset button
• Pin header for external button

Schematics

Boards

PCB Render

Built using KiCAD v7, the board is design to connect to the programming and charge pad of Teapotlabs BWLR1E via pogo-pins connector

The following design are based on the latest revision.

Top BoardBottom Board

PCB Top and Bottom Layout

Case

Teapotlabs BWLR1E Programmer Exploded View

Built using TinkerCAD. The case are 3D printable with any generic 3D printer with/without support. The STL files are available here The case is made of 3 parts:

• Main case: holds the Programmer.
• Separator: separate the programmer and Teapotlabs BWLR1E.
• Locks: locks Teapotlabs BWLR1E in place for charging the device.

Case Open

Bill Of Materials

Most of the components are generic and can be bought from any electornics/semi-conductor distributor. The bill of materials can be downloaded here

Programming Teapotlabs BWLR1E

Setting-up Teapotlabs BWLR1E Programmer

Using the programmer, Teapotlabs BWLR1E can be programmed via the USB-C available in the programmer. Out of the factory, the Teapotlabs BWLR1E chip ships with an AT firmware that can be tested by sending AT commands using the programmer USB-C.

The following are some very good tutorial to start developing with the device:

• Communicating with the AT firmware
• Programming with Arduino
• Programming with STM32Cube
• Programming with MbedOS

Available SDK

Through the USB-C, user can program Teapotlabs BWLR1E using the following SDK:

• Arduino RUI3 SDK
• Arduino STM32duino SDK
• MbedOS
• STM32Cube

Other than Arduino RUI3 SDK, to program the device, user need to put the device in Serial Bootloader mode by,

• Press and Hold BOOT and RESET button
• Release RESET button
• Wait few seconds ( try 2 seconds )
• Release BOOT button
• Device should be in Serial Bootloader mode.

You can also use STM32CubeProgrammer , instead of the SDK to upload a firmware

License

The product is open-source! However, some part of library used under src, might have it's own license. Please reach out or create a ticket to report any license violation.