Battery ESP32 WiFi Sensor Schematic

via Freelancer ·

Budget / SalaryC$30–250
TypeFreelance project
LocationRemote
Posted2 hours ago
I am putting together a compact, battery-operated WiFi node that measures temperature with a BME280 and publishes the readings over 2.4 GHz via an ESP32 module. Everything will be powered from standard AA batteries, so every component choice and connection needs to favour low-current operation and a supply range down to about 2.0 V.

The work I need from you is strictly at the design stage: a clean, production-ready KiCAD project that I can hand straight to a PCB house.

Key design notes
• Core MCU: ESP32 (any readily available module is fine; the smaller the better).
• Sensor: BME280 (I am using it solely for temperature now, but its built-in pressure and humidity channels must remain wired so I have the option to enable them later).
• Power: AA cells with an efficient, low-quiescent-current regulator. Please add a simple battery-voltage monitor input so I can track remaining capacity in firmware.
• General: include decoupling, reset/boot jumpers, programming header, and silk labels; route everything so the WiFi antenna area stays clear.

Deliverables
– KiCAD 6/7 schematic file with ERC clean.
– Generated netlist and footprints already assigned.
– Complete BOM (CSV or XLSX) with manufacturer part numbers and at least one viable distributor for each item.
– Brief notes on the expected standby/run current draw and any component tweaks you recommend if I need to push battery life even further.

Acceptance criteria
The schematic must pass ERC/DRC without errors, use components currently stocked at a mainstream distributor (e.g. Mouser, Digi-Key, LCSC), and respect the antenna keep-out guidelines provided by Espressif.
electronics microcontroller electrical engineering pcb layout antenna design embedded systems firmware development sensor integration
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