# ESP-WROOM-02U Reference Design ## Description This project is a reference design for an ESP-WROOM-02U based device. It features USB-C for power and data transfer, onboard voltage regulation, and multiple peripheral connections. It also includes a CH340C for USB to serial conversion #referenceDesign #project #ESP8266 #WROOM #RF #WIFI #MCU #referenceDesign #simple-embedded #espressif #template #reference-design ## Project Details - **Owner:** dani200 - **Created:** 12/6/2024 - **Last Updated:** 12/8/2024 - **Visibility:** Public - **License:** https://creativecommons.org/licenses/by/4.0/ ## Key Components ### J1 — [SoilSensor](https://www.flux.ai/mikellg/soilsensor~sa.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - GND [pin 3] - OUT [pin 1] - V [pin 2] ### OLED1 — [OLED 0.91" 128x32 I2C](https://www.flux.ai/vasy_skral/oled-091-128x32-i2c~kl.md) - Part Type: Display Device **Pins:** - 5V [pin 3] - GND [pin 4] - SCL [pin 2] - SDA [pin 1] ### SW1 — [EVQ-Q2Y03W](https://www.flux.ai/jecstronic/evq-q2y03w~jb4.md) - Datasheet URL: https://datasheet.octopart.com/EVQ-Q2Y03W-Panasonic-datasheet-138897726.pdf - Part Type: Switch - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: RS Components - Manufacturer Part Number: EVQ-Q2Y03W **Pins:** - A [pin 1] - A [pin 2] - B [pin 2] - B [pin 2] ### U1 — [CHAINA_ESP2](https://www.flux.ai/ponasslamstas/chainaesp2~ji.md) - Datasheet URL: https://components101.com/development-boards/nodemcu-esp8266-pinout-features-and-datasheet - Manufacturer Part Number: Nodemcu-12E ESP8266 - Part Type: Microcontroller **Pins:** - 3V3 [pin 25] - 3V3 [pin 11] - 3V3 [pin 16] - A0 [pin 1] - CMD GPIO11 [pin 7] - D0 GPIO16 [pin 30] - D1 GPIO5 SCL [pin 29] - D2 GPIO4 SDA [pin 28] - D3 GPIO0 [pin 27] - D4 GPIO2 [pin 26] - D5 GPIO14 [pin 23] - D6 GPIO12 [pin 22] - D7 GPIO13 [pin 21] - D8 GPIO15 [pin 20] - EN [pin 12] - GND [pin 24] - GND [pin 10] - GND [pin 14] - GND [pin 17] - RST [pin 13] - RSV1 [pin 2] - RSV2 [pin 3] - RX GPIO3 [pin 19] - SCLK GPIO6 [pin 9] - SD0 GPIO7 MISO [pin 8] - SD1 GPIO8 MOSI [pin 6] - SD2 GPIO10 [pin 4] - SD2 GPIO9 [pin 5] - TX GPIO1 [pin 18] - VIN [pin 15] ### U2 — [DHT11](https://www.flux.ai/vasyl/dht11~e2.md) - Manufacturer Name: Adafruit Industries LLC - Datasheet URL: https://cdn-learn.adafruit.com/downloads/pdf/dht.pdf - Part Type: Sensor - Manufacturer Part Number: DHT11 **Pins:** - DATA [pin 2] - GND [pin 4] - NC [pin 3] - VDD [pin 1] ### U3 — [PIR203A-D0](https://www.flux.ai/lcsc/pir203a-d0~7cte.md) - Manufacturer Name: NEWOPTO(鑫永诚光电) - Package or Case Code: TO-5-3_BD9.1-P2.54_PIR203A-D0 - Part Type: Human Body Sensing Sensor - Manufacturer Part Number: PIR203A-D0 - LCSC Part Number: C2887900 **Pins:** - D [pin 1] - G [pin 3] - S [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/dani200/esp-wroom-02u-reference-design~dp](https://www.flux.ai/dani200/esp-wroom-02u-reference-design~dp).* --- *Generated from [https://www.flux.ai/dani200/esp-wroom-02u-reference-design~dp](https://www.flux.ai/dani200/esp-wroom-02u-reference-design~dp)*