ESP32 T-Call 1.4 based PCB

[haklein]

I've created a PCB and a platformio sketch for the T-Call v1.4. The PCB supports two hx711, a BME, a 1 wire temp sensor and allows to carry the waveshare MPPT solar charger. It's made to fit a Boxexpert ‎BXPKABS12516782-H01 waterproof box. The ESP32 does RTC based deep sleep and the included GSM module sends the measurements to thingspeak. Is there interest to add this to the HoneyPi repo?

[JavanXD]

Hi @haklein , this looks pretty cool, specially with the GSM module. Was there additional need to run any scripts (like the SIM880L Installer) on the firmware, to make it work? Or does this work without firmware changes?
If you don't mind, you can attach the files here into this "Issue" #13 and then I will publish it. WOuld be good to have some more instructions, maybe the parts that are needed to be purchases.

[haklein]

Bienenwaage.ino.txt

This works ootb, no need for any sim800 installers etc.

`[env:ttgo-t-call]
src_dir = src
platform = espressif32
board = esp-wrover-kit
framework = arduino
monitor_speed = 115200
lib_deps =
TinyGSM
adafruit/Adafruit Unified Sensor@^1.1.14
adafruit/Adafruit BME280 Library@^2.2.4
paulstoffregen/OneWire@^2.3.8
bogde/HX711@^0.7.5
milesburton/DallasTemperature@^3.11.0

build_flags=
-D MODEM=1
-D DO_DEEP_SLEEP=1
-D TIME_TO_SLEEP=900

`

[haklein]

Gerber_beescale_PCB_beescale_2024-11-30.zip
Schematic_beescale_2024-11-30.pdf

[haklein]

BOM:
T-Call v1.4
Waveshare solar power management module: https://www.waveshare.com/solar-power-manager.htm
BME280
DS18b20
BOXEXPERT Abzweigdose Serie Hanse 125x167x82mm
2x HX711 + strain gauge (mind the footprint on the PCB)