SendIt - ADC Input Multitool

SendIt Board Assembled

SendIt is an open-hardware, open-firmware controller designed as a multi use tool for handling various inputs with a focus on DIY marine usage. It runs on the Yarrboard Framework and provides a clean web UI for configuration, and multiple different APIs for accessing your data.

Built on the ESP32-S3, SendIt has 8 channels of 16-bit ADC with configurable input circuits. This board can handle these types of inputs:

  • 4-20ma Transducers/Senders
  • 240-30 ohm / 0-180 ohm senders
  • Positive Switching
  • Negative Switching
  • 0-32v Input
  • 0-5v Input
  • 0-10k ohm resistance
  • Thermistors
  • Raw ADC Input

User Interface

SendIt - Typical interface

  • Local HTML5 web interface served from the ESP32
  • Fast, mobile-friendly design
  • Works on phones, laptops, and supported MFDs
  • Real-time dashboard with sensor readings
  • Web based UI config - no manually editing config files

Integrations

  • MQTT
  • SignalK
  • Home Assistant
  • HTTP/REST endpoints
  • WebSocket real-time control