ECSS / KiCad / PCB / components, schematic, layout, order production / Baseboard with STM32G031

Environmental Citizen Sensor Station by FIfF eV

Baseboard with MC, sensors, solar power supply, jacks and socket for LoRaWAN piggypack.
for temperature range -20 .. 80°C (or more), for outside use

Project has to be done with KiCad 6.
- capture well defined components and footprints and/or take it from KiCad Library
- draw schematic, design process in communication with me
- draw pcb layout
- mayor steps have to be cleared by me, drc and erc have to be correct
- publish all project files on github
- order some prototypes to be produced

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- rectangular PCB, 4 Layers, ca. 135 x 110 mm

- PCB to fit and screw-able to the four corners into 5U330801 case
https://cdn-reichelt.de/documents/datenblatt/C700/5U330801.pdf

- 2x socket 1x20 pin header jack 2.54 for
https://www.st.com/en/evaluation-tools/stdes-wl5u4sbb.html
STDES-WL5I4SBB MB1842 UFBGA 4 SMD [864:928 MHz]/22 dBm

- MC STM32G071CBU3 (if not available then footprint-compatible pins of STM32G070CBT6) LQFP-48 with crystals etc
https://www.st.com/en/microcontrollers-microprocessors/stm32g071cb.html

- SWD-plug for st-link V3 debugger, STDC14 pin header
see P.24, Chapter 8.1.2 in
https://www.st.com/content/ccc/resource/technical/document/user_manual/group1/99/49/91/b6/b2/3a/46/e5/DM00526767/files/DM00526767.pdf/jcr:content/translations/en.DM00526767.pdf

- MC-UART to UART-AT-Interface, with grove plug UART to connect Grove Wio-E5
https://www.seeedstudio.com/Grove-LoRa-E5-STM32WLE5JC-p-4867.html?queryID=5378030319355706999810b07606f526&objectID=4867&indexName=bazaar_retailer_products

- 2x13 pin header 2.54 for PIGI
https://apollo.open-resource.org/lab:pigi:hardware#pigi-hardware
pin_1:3V3; pin_2:5V; pin_7:pulse to timer-input of MC STM32G031; pin_25:GND
four holes to mount SBM-20 GM-tube on PCB by zip-tie
https://mightyohm.com/blog/products/geiger-counter/sbm-20-tube-specs/

- footprint to mount / solder BG-51
https://www.teviso.com/file/pdf/bg51-data-specification.pdf

- Grove plug for Sensirion SCD41-D-R2 (for CO2)

- Grove plugs for ca 3xI2C, ca 3xUART, ca 2xGPIO, ca 2xGPIO with timer-input, ca 2xGPIO with analog-in for ex. Grove - Analog Microphone (MEMS) SKU 101020852
at each Grove plug a second parallel pin header 6 pins 2.54 ( each with two additions IOs)
https://www.seeedstudio.com/Grove-Female-Header-SMD-4P-2.0mm-20Pcs-p-4589.html

- we can integrate some sensors straight onto the pcb and then avoid some Grove plugs
we prefer sensors from st (temperaturs, microphone, humidity, pressure, magnetic orientation, acceleration ... )

- Grove plug for Grove SEN55
https://www.seeedstudio.com/Grove-All-in-one-Environmental-Sensor-SEN55-p-5373.html?queryID=6f4ae22121a3b75a19ed26f02719266a&objectID=5373&indexName=bazaar_retailer_products

- 2x4 or 1x8 screw terminal to connect to J2 of Rain Gauge RG-9 or RG-15
https://www.seeedstudio.com/Rain-Gauge-RG-15-p-4648.html?queryID=f587e7425cd47f94d5829e4d73d37a22&objectID=4648&indexName=bazaar_retailer_products

- DC/DC PV converter to charge accus from a PV-panel
- 2x LiFePO4 18650 in series
- two accu holders for 18650 in series
- Uin min ca 10V)
- Uin max 70VDC
- Uout max 7V (2x3,5V)
- Iout ca. 0,5A
- buck-IC preferable low-emission with internal switch by st, ti, maxim, analog ...

- DC/DC VCC 3.3V converter
- Uin max 10V from accus
- Uout 3,3V ca 0,5A (?) für MCs and sensors
- Uout 5V ca 0,3A (?) for PIGI
- Uout off when Uin < 5,2V
- buck-IC preferable low-emission with internal switch by st, ti, maxim, analog ...


- DC/DC VCC 5V converter
- Uin max 10V from accus
- Uout 3,3V ca 0,5A (?) für MCs and sensors
- Uout 5V ca 0,3A (?) for PIGI
- Uout off when Uin < 5,2V
- buck-IC preferable low-emission with internal switch by st, ti, maxim, analog ...