3.3 V-powered pH and ORP probe interface using an ADS1115 module, MCP6002 through-hole buffers, and DS18B20 temperature sensing. External ESP32 connection is through one 5-pin header carrying 3V3, GND, SDA, SCL, and DQ; ADS1115 ADDR is fixed locally and ALERT is unused.

Breadboard adapter for the Moddo pinch: a 2×8 1.27 mm through-hole center header broken out to 2.54 mm through-hole headers on an 18 × 15 mm, 2-layer PCB.

Small breadboard-friendly breakout/carrier PCB for the Moddo pinch SAMD11 dev board, converting its 16-pin 1.27 mm header to 2.54 mm through-hole breakout pins. Mechanical dimensions are marked verify-against-hardware until Moddo publishes official drawings.