No files yet? We draw the board. Have files? We land them.

AI can sketch a circuit. A factory can fab it. We sit in both gaps: a complete schematic and PCB project, firmware written here, then DFM, bring-up, and a path the next batch can repeat.

What this lab designs and writes

Taken from boards and firmware already built here. Say which of these you need.

Four packages. Not an open-ended project.

Say design, DFM, bring-up, or repeatable when you write.

How a job starts

Projects you can read now

• Blink status LED — The first proof a board is alive. On a product this is the power or status lamp.
• Hello World UART heartbeat — Tells you in one page whether the toolchain, flash path and serial monitor work.
• Wi-Fi Station join — Join an existing router and get an IP. Almost every cloud product starts here.
• Wi-Fi SoftAP hotspot — The device hosts its own hotspot for phone-based provisioning or local control.
• Wi-Fi Scan — List nearby APs and RSSI. Used for channel choice and provisioning lists.
• Wi-Fi Power Save — Stay associated with less current. Required reading for battery products after Station.
• HTTP Server local page — Serve a page on the device to change settings. Common for small-batch debug.
• HTTP Client to the cloud — Device-side GET/POST. Fits REST backends.

See all projects

Modules

Look for a module that fits, then start building the idea.

• 9-axis IMU capture window — A 2.5 s slice from the middle of a real 9-axis log: accelerometer, gyroscope, magnetometer at 100 Hz. The page states the hardware path and the firmware capture flow, then plots that window.
• IoT Desktop Environmental Monitor — An ESP32-based desktop environmental monitor with temperature/humidity, CO2, and VOC sensing, LCD touchscreen interaction, Wi-Fi upload, OTA updates, real-time weather, and historical data charts accessible on both the device and phone, with bypass charging for battery protection.
• ottoRobot - ESP32-Based Bipedal Robot Controller — Open-source control system for the Otto bipedal robot, built on the ESP32 family, supporting multiple motion modes and AI interaction via XiaoZhi AI or Tuya AI.
• box-keychain: ESP32 E-Paper Keychain — A keychain-sized e-paper display that changes image every 30 minutes and lasts over 20 days on standby
• WLED LED Strip Controller (ESP32) — An ESP32-based WLED firmware controller for addressable LED strips like WS2812B, controlled over WiFi from a browser or mobile app.
• ESP-Hi: ESP32-C3 Ultra-Low-Cost AI Chat Robot Dog — An ESP32-C3 based ultra-low-cost AI chat robot dog supporting multiple LLM conversations, motion wake-up, color expression display, and a dozen pre-programmed actions.
• 12V to 220V DC Boost Module (MAX1771) — A MAX1771-based DC-DC boost converter that steps 12V up to 220V DC, designed for high-voltage loads such as Nixie tubes and tube amplifiers.
• Ultra-Mini Boost Module (SX1308) — A compact boost converter based on the SX1308, suitable for portable power applications, with adjustable output up to 28V.

Short answers you can cite

Engineer questions written as pages. An AI search can point at one URL instead of a whole catalog.

• ESP32 status LED does not blink. What should I check first? — Confirm the GPIO in firmware matches this board. GPIO2 is common on ESP32-DevKit; many C3 boards use GPIO8. Copying the pin from another chip is the usual miss.
• ESP32 joined Wi-Fi but never gets an IP. Where do I look? — Station mode needs a router that hands out DHCP. A phone hotspot that requires a captive portal will sit associated with no usable IP.
• Why is ESP32 deep-sleep current still high? — Deep sleep only helps if wake pins are not floating and peripherals are really off. A floating GPIO can leak milliamps.
• ESP32 MQTT client never stays connected. What usually breaks? — MQTT needs a working Station IP and a reachable broker. If DNS or the port is blocked, the client retries forever with little in the log.
• Phone cannot find the ESP32 BLE device. What is missing? — Advertising must be running, and the name/UUID the phone filters on must match. A GATT server that never advertises is invisible.
• How do I talk to a meter on RS-485 from ESP32 UART? — UART echo only proves TX/RX and baud. RS-485 is a transceiver and a DE/RE pin, not a different UART peripheral.
• ESP32 I2C scan finds nothing. What is usually wrong? — Pull-ups must exist on SDA and SCL (typical 2.2k–10k to 3.3V). Many breakout boards already have them; a bare chip does not.
• How do I wire a 2.0 inch ST7789 SPI TFT to ESP32? — ST7789 panels are usually 4-wire SPI plus DC, RST and backlight. Match the 12-pin FPC pinout on that exact module — pin numbers are not universal.

See all short answers

PCB process the design must survive

Leo designs schematic and layout, and reviews the same sequence a fab and SMT line will run. We do not run a factory. This is what the board has to live through.

See the PCB process

Body OS

Talk got cheap. A body that any mind can wear — without the firmware guessing — is still scarce. This lab is building that operating system: discover every organ, install a brain, keep the kernel as a post office.

Read Body OS — then join

神赐

Speech already reaches the brain slot. The round trip is too slow, and the uplink is too fat. 神赐 is a grant the main brain issues so this body can wash a stream or emit menu steps locally — without rewriting Body OS.

Read 神赐 — local rules v0.9