# Overall Coffee P.K.E. Meter ## Description Welcome to your new project. Imagine what you can build here. ## Project Details - **Owner:** sayya2024 - **Created:** 8/22/2024 - **Last Updated:** 8/22/2024 - **Visibility:** Public ## Key Components ### 7.4v 18650 battery (3.7v *2) — [BK-18650-PC2](https://www.flux.ai/vasyl/bk-18650-pc2.md) - Voltage: 4.2V - Datasheet URL: https://www.memoryprotectiondevices.com/datasheets/BK-18650-PC2-datasheet.pdf - Manufacturer Name: MPD (Memory Protection Devices) - Manufacturer Part Number: BK-18650-PC2 **Pins:** - NEGATIVE [pin -] - POSITIVE [pin +] ### BME280 — [BME280](https://www.flux.ai/vasy_skral/bme280.md) - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Symbol Style: Parametric - Datasheet URL: https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bme280-ds002.pdf - Manufacturer Part Number: BME280 - Manufacturer Name: Bosch Sensortec **Pins:** - CSB [pin 2] - GND [pin 7] - GND [pin 1] - SCK [pin 4] - SDI [pin 3] - SDO [pin 5] - VDD [pin 8] - VDDIO [pin 6] ### DHT22 — [DHT22](https://www.flux.ai/vasy_skral/dht22.md) - Manufacturer Part Number: DHT22 - Package or Case Code: Module - Datasheet URL: https://cdn-shop.adafruit.com/datasheets/Digital+humidity+and+temperature+sensor+AM2302.pdf - Part Type: Sensor - Manufacturer Name: Asair - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - DATA [pin 2] - GND [pin 4] - NULL [pin 3] - VDD [pin 1] ### Light sensor — Rain sensor - Part Type: Connector - Manufacturer Part Number: SM04B-SRSS-TB - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/JST%20PDFs/SR%20Connector.pdf - Manufacturer Name: JST Sales America Inc. **Pins:** - A0 [pin 3] - D0 [pin 4] - GND [pin 2] - VCC [pin 1] ### LM2596 Step down converter — [LM2596 DC-DC buck converter](https://www.flux.ai/vasy_skral/lm2596-dc-dc-buck-converter.md) - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - IN - [pin 2] - IN + [pin 1] - OUT - [pin 3] - OUT + [pin 4] ### MQ-135 — [MQ-135](https://www.flux.ai/vasy_skral/mq-135.md) - Manufacturer Part Number: MQ-135 - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.electronicoscaldas.com/datasheet/MQ-135_Hanwei.pdf - Part Type: Sensor - Manufacturer Name: HANWEI ELECTRONICS **Pins:** - A1 [pin 6] - A2 [pin 4] - B1 [pin 1] - B2 [pin 3] - VH- [pin 5] - VH+ [pin 2] ### Positive power bus — [Pin Header 01x10 2.54mm Vertical](https://www.flux.ai/vasy_skral/pin-header-01x10-254mm-vertical.md) - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_10 [pin 10] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] - Pin_9 [pin 9] ### Rain sensor — Rain sensor - Manufacturer Part Number: SM04B-SRSS-TB - Part Type: Connector - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/JST%20PDFs/SR%20Connector.pdf - Manufacturer Name: JST Sales America Inc. **Pins:** - A0 [pin 3] - D0 [pin 4] - GND [pin 2] - VCC [pin 1] ### U1 — [ESP32-WROOM-32D](https://www.flux.ai/vasyl/esp32-wroom-32d.md) - Part Type: Microcontroller - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32d_esp32-wroom-32u_datasheet_en.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Espressif Systems - Manufacturer Part Number: ESP32-WROOM-32D **Pins:** - 3.3V [pin 2] - AGND [pin 39] - CLK [pin 20] - CMD [pin 19] - EN [pin 3] - GND [pin 38] - GND [pin 15] - GND [pin 1] - IO0 [pin 25] - IO12 [pin 14] - IO13 [pin 16] - IO14 [pin 13] - IO15 [pin 23] - IO16 [pin 27] - IO17 [pin 28] - IO18 [pin 30] - IO19 [pin 31] - IO2 [pin 24] - IO21 [pin 33] - IO22 [pin 36] - IO23 [pin 37] - IO25 [pin 10] - IO26 [pin 11] - IO27 [pin 12] - IO32 [pin 8] - IO33 [pin 9] - IO34 [pin 6] - IO35 [pin 7] - IO4 [pin 26] - IO5 [pin 29] - NC [pin 32] - RXD0 [pin 34] - SD0 [pin 21] - SD1 [pin 22] - SD2 [pin 17] - SD3 [pin 18] - TXD0 [pin 35] - VN [pin 5] - VP [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/sayya2024/overall-coffee-ppkpep-meter](https://www.flux.ai/sayya2024/overall-coffee-ppkpep-meter).* --- *Generated from [https://www.flux.ai/sayya2024/overall-coffee-ppkpep-meter](https://www.flux.ai/sayya2024/overall-coffee-ppkpep-meter)*