# ESP32Tag Mini Reference Design ## Description This project is a minimal setup for of tag device that uses the ESP32-WROOM-32E to communicate with other BLE devices. #referenceDesign #project #ESP32 #ESP32WROOM #RF #WIFI #MCU #tag #airtag #referenceDesign #simple-embedded #espressif #reference-design #polygon ## Project Details - **Owner:** vasy_skral - **Created:** 1/31/2024 - **Last Updated:** 3/4/2026 - **Visibility:** Public - **License:** https://creativecommons.org/licenses/by/4.0/ - **Copies:** 1 ## Key Components ### - BAT + — [JST B2B PH K 01x02 Connector](https://www.flux.ai/jharwinbarrozo/jst-b2b-ph-k-01x02-connector.md) - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151524_JST-Sales-America-B2B-PH-K-S-LF-SN_C131337.pdf - Manufacturer Name: JST Sales America - Part Type: Connector **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### SW1 — [TS-1088R-02026](https://www.flux.ai/jecstronic/ts-1088r-02026.md) - Part Type: Switch - Manufacturer Part Number: TS-1088R-02026 - Manufacturer Name: XUNPU - Datasheet URL: https://datasheet.lcsc.com/lcsc/1912111437_XUNPU-TS-1088R-02026_C455280.pdf **Pins:** - P1 [pin 1] - P2 [pin 2] ### U1 — [AP2112K-3.3TRG1](https://www.flux.ai/vasyl/ap2112k-33trg1.md) - Manufacturer Name: Diodes Incorporated - Datasheet URL: https://www.diodes.com/assets/Datasheets/AP2112.pdf - Part Type: Integrated Circuit - Manufacturer Part Number: AP2112K-3.3TRG1 **Pins:** - EN [pin 3] - GND [pin 2] - VIN [pin 1] - VOUT [pin 5] ### U2 — [ESP32-WROOM-32E](https://www.flux.ai/vasy_skral/esp32-wroom-32e.md) - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32e_esp32-wroom-32ue_datasheet_en.pdf - Manufacturer Name: Espressif Systems - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: ESP32-WROOM-32E **Pins:** - GND=> . [pin 15] - EN [pin 3] - GND [pin 38] - GND [pin 39] - 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 18] - NC [pin 19] - NC [pin 17] - NC [pin 21] - NC [pin 22] - NC [pin 32] - NC [pin 20] - RXD0/IO3 [pin 34] - SENSOR_VN [pin 5] - SENSOR_VP [pin 4] - TXD0/IO1 [pin 35] - VDD [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/vasy_skral/esp32tag-mini-reference-design](https://www.flux.ai/vasy_skral/esp32tag-mini-reference-design).* --- *Generated from [https://www.flux.ai/vasy_skral/esp32tag-mini-reference-design](https://www.flux.ai/vasy_skral/esp32tag-mini-reference-design)*