HydraESP32 HydraBus v1.0 Shield for ESP-WROOM-32 V1.1 Rev1.0 (Tested)
https://oshpark.com/shared_projects/dgKJqznH
HydraBus Shield / Breakout board for ESP-WROOM-32 or ESP-32S.
This shield can be used with or without HydraBus board, you can even cut HydraBus specific right side (on the line) to have a tiny ESP-WROOM-32 breakout board.
It is not mandatory to solder the components on this shield in order to use it, you will just need to connect +3v3 on VCC Pin header
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New features versus previous version V1.0 Rev1.1:
- Added LDO (TPS73633DBVR SOT23-5) to convert 5V(VUSB) to a clean VCC (+3.3v) for ESP32 and which can be enabled by an HydraBus Pin or with a JUMPER on J7 (which connect +3.3V from HydraBus to EN of the LDO)
- Added VCC connector in order to measure ESP32 current/power consumption (if not used to measure current just add a JUMPER on VCC to power the ESP32)
- Added J6 connector to have access to ESP32 SPI FLASH IOs (now all pins are available)
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This shield can be used only on bottom of HydraBus board (in order to use other shields on top of HydraBus)
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The HydraBus board is a small (60mm x 37mm) and low cost, multi-tool extensible board with STM32F405 Cortex M4F 32bits MCU @168MHz with a fully open source firmware hydrafw and full online documentation hydrafw wiki
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The ESP-WROOM-32 is a low-power 32-bit 240 MHz dual core MCU Wi- Fi+BLE combo module that highly integrates TCP/IP network stacks, 12- bit ADC and HSPI/SDIO/UART/PWM/I2C/I2S interfaces. See ESP32 Overview, ESP-WROOM-32 link/info, Espressif Products Overview including ESP-WROOM-32 PDF
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Design based on official esp_wroom_32_datasheet_en.pdf (September 26, 2016)
BOM:
| Qty | Value | Device | Package | Parts | Description |
|---|---|---|---|---|---|
| 1 | - | ESP_WROOM_32 or ESP-32S | ESP-WROOM-32 or ESP-32S | U1 | Espressif ESP-WROOM-32 or ESP-32S Module |
| 1 | - | TPS73633 | SOT23-5L | U2 | Texas Instrument LDO |
| 1 | 2.2uF | CAPACITOR_NPOL-0603 | C603 | C1 | SMD Non-Polarized capacitor |
| 1 | 1uF | CAPACITOR_NPOL-0603 | C603 | C2 | SMD Non-Polarized capacitor |
| 2 | 100nF | CAPACITOR_NPOL-0603 | C603 | C3, C4 | SMD Non-Polarized capacitor |
| 2 | 10K | RESISTOR-0603 | R603 | R1, R2 | SMD Resistor |
| 1 | - | HYDRABUS_SHIELD_M2X7 | J1 | 2x7 Pin header | |
| 4 | - | HYDRABUS_SHIELD_M2X10 | J2, J3, J4, J5 | 2x10 Pin header | |
| 2 | - | HYDRABUS_SHIELD_M1X6 | J6, SWD_DEBUG | 1x6 Pin header | |
| 2 | - | Jumper - 2 Pin | J7, VCC | Jumper 2 Pin | |
| 2 | - | CON_HEADER_1X02-PTH | J7, VCC | 1x2 Pin header |
Note1: LDO U2 can be also replaced by MIC5319-3.3YD5-TR (Microchip)
Note2: If you do not want to solder those components you can avoid them and directly connect HydraBus 3v3 to VCC Pin near J5 marking
For more details see also HydraBus_1_0_Shield_ESP_WROOM_32_v1_1_Rev1_BOM.csv
Tested with success with an ESP-32S Module from Ai-Thinker (it is recommended to use official Espressif ESP-WROOM-32)
HydraBus_1_0_Shield_ESP_WROOM_32_v1_1_Rev1_Top: HydraBus_1_0_Shield_ESP_WROOM_32_v1_1_Rev1_Top
HydraBus_1_0_Shield_ESP_WROOM_32_v1_1_Rev1_Bottom: HydraBus_1_0_Shield_ESP_WROOM_32_v1_1_Rev1_Bottom