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How to test the firmware in QEMU without a board with Pocket Tank

Run the ESP32-S3 firmware in QEMU to check the tank logic before flashing real hardware.

Who it is forAn embedded developer who wants to test changes to the reflex layer or model code without a physical board on the desk.

The problemEach hardware test cycle costs time and risks a bad flash, and a board may not be on hand.

The outcomeA firmware build running inside QEMU that you can check against the README behavior before you touch hardware.

What you need first

  • A PC to read the code and run the simulator (the README points to a PC simulator section)
  • A C compiler on your PC for the simulator build (inferred)
  • A supported Waveshare board for real hardware: 1.8-inch, pendant, watch, or square (the board costs about $35 per the README)
  • A USB cable for the first install; later updates come over Wi-Fi from v0.3

Steps

  1. Clone the repo: git clone https://github.com/mediacutlet/pocket-tank (inferred) (inferred, check the README)
  2. Open the README section 'Try it: firmware in QEMU' and install the tools it lists
  3. Build the firmware following that section
  4. Start the QEMU run and confirm the tank renders
  5. Compare a fish's state line and reflex motion against the README example

Prompt for your agent

Use the mediacutlet/pocket-tank repo. Follow the 'Try it: firmware in QEMU' section to build and boot the firmware in QEMU, then report whether the tank screen renders and which goal the first fish selects. Verify that the boot finishes without a crash.

Caveat. The README mentions QEMU but the exact tool setup and commands are not in the excerpt, so read that section in full before you install anything.

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