generated: '2026-08-04'
method: searched
source: https://github.com/Neros-Technologies/apex_devkit
applies_to: APEX — Adaptive Payload EXchange
notes: >-
  Neros publishes no hosted sandbox, no test API keys and no test/live mode separation —
  it has no HTTP API. What it does publish is the hardware equivalent: a development kit
  with a host emulator and a reference device firmware, plus a unit-test suite that
  replays the byte-level worked examples from the specification. Every value below is
  taken verbatim from the published repositories; none was invented.

kind: hardware development kit + emulator + conformance test suite

devkit:
  name: apex_devkit
  url: https://github.com/Neros-Technologies/apex_devkit
  license: MIT
  build_system: bazel
  description: Development tools for rapid iteration on APEX payloads and hosts.
  targets:
  - name: host_emulator
    role: Host
    path: host_emulator/
    mcu: STM32G071xx (STM32G0 series)
    description: >-
      Firmware that emulates the drone-side APEX host so a payload can be brought up
      without a flight controller. Wires UART, DMA, DAC and GPIO against the ST HAL and
      drives apex_host_app.
  - name: reference_device
    role: Device
    path: reference_device/
    mcu: STM32G071xx (STM32G0 series)
    description: >-
      Firmware that implements the payload side of APEX, so a host implementation can be
      brought up against a known-good device. Wires UART, DMA, ADC and GPIO and drives
      apex_dev_app.
  toolchain:
  - bazel_armclang — ARM toolchain for embedded Bazel integration (https://github.com/Neros-Technologies/bazel_armclang)
  - third_party/stm32 — CMSIS core, CMSIS device G0, STM32G0xx HAL driver
  dependency: third_party/apex — the APEX reference library

test_suite:
  path: https://github.com/Neros-Technologies/APEX/tree/main/lib/test
  framework: GoogleTest
  run: make test
  fixture_note: >-
    The suite "mirrors the byte-level worked example from
    APEX_Device_Class_Activation.md §9.4" — the specification's own worked frames are
    the test fixtures, so the spec and the implementation are checked against one
    another rather than against invented data.
  tests:
  - test_activation_gpio.cc
  - test_activation_walkthrough.cc
  - test_analog_hmi.cc
  - test_cobs.cc
  - test_crc.cc
  - test_discovery.cc
  - test_framer.cc
  - test_repeater.cc

simulation:
  name: Colosseum
  url: https://github.com/Neros-Technologies/Colosseum
  upstream: Colosseum / AirSim
  first_party: false
  note: >-
    A fork in the Neros GitHub organization of the open-source Unreal Engine simulator
    for autonomous robotics. Recorded because it is part of the org's public tooling; it
    is not a Neros-authored product and carries no Neros-specific test fixtures.

published_test_values:
  note: >-
    The specification publishes worked frame examples in hex, using a documented notation
    (protocol_version / traffic_type / device_id / payload_length, then the inner payload)
    with the CRC and COBS framing applied by the sender and omitted from the byte lines.
    Those frames live in spec/APEX_Core.md §3.1.5 and the device-class specs, and are
    reproduced by the test suite rather than duplicated here.
  reserved_values:
  - {value: '0x00', field: device_id, meaning: unassigned — the value a device uses before the host assigns one}
  - {value: '0xFF', field: device_id, meaning: broadcast — host-originated frames to all devices}
  - {value: '115200', field: baud, meaning: the rate every session starts at}

no_hosted_sandbox:
  reason: no HTTP API
  test_live_separation: not applicable — no API keys are issued
  probed:
  - url: https://api.neros.tech/
    status: 000
  - url: https://developer.neros.tech/
    status: 000

x-evidence:
  fetched: '2026-08-04'
  sources:
  - url: https://api.github.com/repos/Neros-Technologies/apex_devkit/git/trees/HEAD?recursive=1
    http_status: 200
  - url: https://raw.githubusercontent.com/Neros-Technologies/APEX/main/lib/README.md
    http_status: 200
  - url: https://api.github.com/repos/Neros-Technologies/APEX/git/trees/HEAD?recursive=1
    http_status: 200