USB-C Sensor Node

Created a project doc

Project Specification

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Project Specification Project Overview
Status: Draft — schematic design in progress.
One universal carrier PCB for a removable LilyGo TTGO T-Beam V1.2 (ESP32, SX1276 915 MHz, GPS). Optional sections are populated as needed for maple-sugar-camp monitoring and control.
Intended Use
Outdoor field nodes in Quebec maple forests. Remote vacuum nodes normally use one solar-charged 18650 and prioritize standby efficiency. Tank-level and relay/control nodes normally use external DC power.
What the Device Should Do
  • Mount the T-Beam on removable 2.54 mm female headers.
  • Accept a 3.0–4.2 V single-cell 18650 supplied by an external CN3065 solar charger.
  • Accept protected center-positive 5–12 V DC barrel input with automatic external-power priority.

flux

I revised the power tree around your deployment split: battery mode gets a low-loss T‑Beam path plus an enableable low-IQ 5 V boost, while barrel mode gets a protected 2 A 5 V buck and automatically takes priority. This avoids forcing the solar node through a continuous 2 A buck-boost; the updated requirements are recorded in the Project Specification.
Thought for 3 mins
Thought for 7 sec
Awaiting 1 background task
"Maple Camp Schematic Design" completed.

flux

I completed the architecture and requirements phase:
  • Renamed the project Maple Camp Universal LoRa Node and updated its description.
  • Created the Project Specification covering the universal PCB, revised split power architecture, optional sensors/relays, and no-routing constraint.
  • Verified the official T‑Beam V1.2 schematic and identified GPIO conflicts:
    • GPIO27, GPIO32, GPIO33: LoRa
    • GPIO34: GPS
  • Recorded the provisional safe mapping:
    • Vacuum ADC: GPIO36
    • Ultrasonic ECHO/TRIG: GPIO39/GPIO25
    • DS18B20: GPIO4
    • Relay 1/2: GPIO13/GPIO14
    • Expansion I²C: GPIO21/GPIO22, shared with the PMU
  • Defined external-priority power paths that prevent barrel-to-battery charging and avoid burdening solar nodes with a continuous 2 A buck-boost stage.
The executor reported completion, but I could not inspect or reconcile its result. The latest confirmed project state still showed 0 components and 0 nets, so I cannot claim that the schematic or ERC is complete.
Execution stopped because your ACUs ran out.

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