{"id":24803900,"url":"https://github.com/mk-it-easy/optoma-esp32-remote","last_synced_at":"2026-04-10T23:55:50.203Z","repository":{"id":274519402,"uuid":"923176436","full_name":"mk-it-easy/optoma-esp32-remote","owner":"mk-it-easy","description":"This project allows you to send commands to an Optoma ZH403 projector over RS-232 via a Wi-Fi REST server using an ESP32 microcontroller. 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The ESP32 connects to a Wi-Fi network and hosts a RESTful API, enabling remote control of the projector through HTTP requests.\n\n**Note:** This is not an official Optoma repository. It is an independent project created to facilitate remote control of the Optoma ZH403 projector.\n\n## Features\n- Send power on/off commands to the Optoma ZH403 projector.\n- Communicate with the projector using RS-232 protocol.\n- Control the projector remotely via a Wi-Fi REST server.\n\n## Hardware Setup\n\n### Components\n- ESP32\n- MAX3232 TTL to RS-232 Adapter\n\n### Connections\n- ESP32 Pin 16 (TX2) -\u003e MAX3232 TX\n- ESP32 Pin 17 (RX2) -\u003e MAX3232 RX\n- ESP32 5V -\u003e MAX3232 VCC\n- ESP32 GND -\u003e MAX3232 GND\n\n```\n    +-------------------+       +------------------+            +------------------+\n    |      ESP32        |       |     MAX3232      |            |   Optoma ZH403   |\n    |                   |       |                  |            |                  |\n    |    5V  ---------\u003e |-------| VCC              |  straight  |                  |\n    |    GND ---------\u003e |-------| GND              |------------|                  |\n    |    TX2 (16) ----\u003e |-------| TX               |   RS232    |                  |\n    |    RX2 (17) ----\u003e |-------| RX               |            |                  |\n    +-------------------+       +------------------+            +------------------+\n```\n\n## Setup\n1. Connect the ESP32 to the Optoma ZH403 projector using an RS-232 interface. Ensure you use a straight-through cable, not a crossed (null modem) cable.\n2. Upload the code to the ESP32.\n3. Configure the Wi-Fi credentials by connecting to the 'Optoma ZH403 - ESP Remote' access point and provide your Wi-Fi credentials.\n4. Access the REST server to send commands to the projector.\n\n## Usage\n- Power On: Send a GET request to `/?command=ON`.\n- Power Off: Send a GET request to `/?command=OFF`.\n\n## Example\n```sh\ncurl http://\u003cesp32-ip-address\u003e/?command=ON\ncurl http://\u003cesp32-ip-address\u003e/?command=OFF\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmk-it-easy%2Foptoma-esp32-remote","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmk-it-easy%2Foptoma-esp32-remote","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmk-it-easy%2Foptoma-esp32-remote/lists"}