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🛠 Nœud de capteur maillé sur pile : le système complet

ESP32-H2 · avance · Schéma : IMG-esp32-h2-avance-3-h2-noeud-mesh-batterie.svg — Cycle de vie d'un nœud sur pile : réveil LP, lecture ADC/capteur, burst radio 802.15.4 ou BLE, retour deep-sleep 7 µA, avec broche GPIO12/VBAT annotée.

Capstone project: a battery-powered mesh sensor node, from A to Z. The H2 combines 802.15.4 (250 Kbps OQPSK, RX down to −102.5 dBm) and BLE 5 Coded PHY (RX down to −106.5 dBm) on a single 2.4 GHz radio, with TX up to +20 dBm — 100 mW, 140 mA at this level — and a deep-sleep current of 7 µA. Architecture choice: Thread (esp-matter or OpenThread via ESP-IDF) if your fleet is Matter, Zigbee (ESP-Zigbee-SDK, certified) if it is Zigbee. Hardware checklist imposed by the datasheet: buttons and wake-ups only on LP domain pins (GPIO0–5 and GPIO22–27 are dead in deep-sleep), GPIO12 left free or instead assumed as the VBAT pin since it is multiplexed with VDDA_PMU, CHIP_EN never floating, VDD3P3 between 3.0 and 3.6 V, 32.768 kHz crystal populated for a clean RTC. Lifecycle: boot → sensor read (12-bit ADC, watch out for date code 342023) → radio burst → esp_deep_sleep_start. >

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