bounty: MicroClaw ESP32-C3 port

[keilogic]

I would like to work on the MicroClaw ESP32 Port bounty listed on the Clawland bounty board for $350.

Bounty board reference: https://clawland.ai/pages/bounty

Planned deliverable:

• Target an ESP32-C3 PlatformIO environment while keeping the existing ESP32 dev environment usable.
• Implement basic sensor reading with configurable analog and DHT-style inputs.
• Add MQTT status/sensor reporting with reconnect/backoff behavior and compact JSON payloads.
• Add OTA update support through ArduinoOTA, gated by configuration and safe no-op defaults.
• Keep memory/flash footprint modest by avoiding heavy dependencies beyond the existing Arduino, PubSubClient, and DHT libraries.
• Document configuration, validation commands, and hardware assumptions.

Validation plan:

• Run PlatformIO build for the configured ESP32-C3 environment if the toolchain is available locally.
• Run static checks available in this repo and git diff --check.
• If hardware is unavailable, clearly mark runtime sensor/OTA/MQTT validation as not hardware-tested rather than overstating it.

I will keep the first PR scoped to the ESP32-C3 firmware port and documentation so maintainers can review it independently.

[keilogic]

Submitted PR: https://github.com/Clawland-AI/microclaw/pull/14\n\nValidation run locally:\n- python -m platformio run -e esp32c3\n- python -m platformio run -e esp32\n- git diff --check\n\nI have not claimed physical ESP32-C3 hardware validation; the PR documents that as the remaining runtime check.

[Jorel97]

Linking my earlier submitted implementation PR for reviewer traceability: #12

PR #12 was opened before this bounty-thread PR link appeared and covers the integrated ESP32-C3 port scope plus the underlying #1-#5 pieces: PlatformIO ESP32-C3 target, DHT22 sensor driver, MQTT reporting, battery/deep-sleep support, OTA window, wiring docs, and a dependency-free validation script. I also updated the PR body to reference this bounty issue directly.

[Jorel97]

Updated PR #12 to cover the compatibility part of this bounty more explicitly:

• added a classic esp32 PlatformIO environment in addition to esp32c3
• added retained status telemetry and documented the MQTT topic/payload contract
• reran platformio run -e esp32c3 and platformio run -e esp32 successfully

PR: #12 (comment)