Phase 5 — Climate read¶

Read SHT40 temp/humidity and BMP390 pressure over the I2C already wired and print them on serial. No new wires.

Firmware¶

Changed. New folder firmware/05-climate/. Leave earlier phase folders untouched.

Preconditions¶

Checkpoint 4 passed (0x44 + 0x77 on this bench)
Phases 2–4 wiring still on

5.1 Flash¶

Stop any serial monitor on COM first.

cd firmware/05-climate
pio run -e esp32-s3-n16r8 -t upload --upload-port /dev/ttyACM0

Connected to ESP32-S3 on /dev/ttyACM0:
…
Hash of data verified.
Hard resetting via RTS pin...
========================= [SUCCESS] Took 35.57 seconds =========================

pio device monitor -b 115200 --port /dev/ttyACM0

weather climate — phase 5
SDA=GPIO8 SCL=GPIO18 SHT40~0x44 BMP390=0x77
sensors ok — printing ~1 Hz
temp_c=25.27  humidity=82.5  pressure_hpa=1014.12
temp_c=25.26  humidity=82.5  pressure_hpa=1014.13

Print ~1 Hz. Values should look like indoor comfort numbers. Pressure is in hPa.

5.2 Validate by hand¶

Resting → stable temp / humidity / pressure lines.
Breathe on the SHT40 → humidity (and often temp) jumps.
Optional: gentle pressure change near the BMP390 → pressure_hpa moves a little.

Checkpoint 5¶

[x] Continuous climate lines on serial
[ ] Humidity reacts to breath (try it once)
[x] Logged in lab-log.md

Stop here until checkpoint passes.

Next: Phase 6 — TFT fill