2 layers192.4 × 50 mm/Omote.kicad_pcb.jpg?size=s&soon)
2 layers50 × 30.9 mm
Esp32 cloud
oliverhanka/esp32_cloud_pcbESP32 low power sensor node
- Size
- 50 × 30.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 23
- Nets
- 58
- Pads
- 152
- Tracks, vias
- 418, 48
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 9 Apr 2020
- Updated
- 21 Apr 2020
Overview
Esp32 cloud is an open-source printed circuit board by oliverhanka, from the oliverhanka/esp32_cloud_pcb repository on GitHub. It is a 2-layer board of 50 × 30.9 mm with 23 parts on 58 nets, routed with 418 tracks and 48 vias.
It is built around the ESP32-PICO-D4 and XC6220B331MR. Its parts include 7 capacitors, 6 connectors, 3 ICs, 2 resistors and 1 diode. It belongs with the home automation and IoT and sensors and measurement boards and the ESP32 and RISC-V boards of this library.
Main components
2
ESP32-PICO-D4
QFN-48-EP(7x7)-40℃~+85℃ -97dBm 150Mbps 2.412GHz~2.484GHz 2.4GHz 2.7V~3.6V 20dBm Bluetooth、WiFi SPI、I2C transceiver QFN-48-EP(7x7) RF Transceiver ICs ROHSEspressif SystemsRF Transceiver ICs
XC6220B331MR
SOT-23-5-40℃~+85℃@(Ta) 1 25uA 3.3V 400mV@(800mA) 5.5V 50dB@(10kHz) 900mA Fixed Over Current Protection、Over Temperature Protection Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdESP32 low power sensor node
This is a simplistic ESP32 based sensor node with a focus on very low power consumption while beeing idle. This means, external components are keept to a minimum and the selected LDO has a very low power consumption. The board can be supplied with 3.3V directly or by using the on-board LDO (max. 6V input) to generate the required 3.3V. NOTE: The LDO_EN solder jumper must be closed in order to use the LDO.
Theoretical power consumption
These values have not been verified by measurements and do not take the passive components into account.
Power consumption while beeing in hibernation:
| Active component | Current | Power |
|---|---|---|
| ESP32 (in hibernation) | 5𝜇A @ 3.3V | 16.5𝜇W |
| LDO | 8𝜇A @ 5V | 40𝜇W |
| Total | 11.3𝜇A @ 5V | 56.5𝜇W |
While beeing active and transmitting via Wifi (BLE off):
| Active component | Current | Power |
|---|---|---|
| ESP32 (240MHz, Wifi tx) | 240mA @ 3.3V | 792mW |
| LDO | 8𝜇A @ 5V | 40𝜇W |
| Total | 158.4mA @ 5V | 792mW |
Connectors / headers / solder jumper
| Connector | Purpose |
|---|---|
| J1 | I2C, power via GPIO14 |
| J2 | power connector, JST-PH |
| J3 | power connector, USB-C |
| J4 | programming interface, compatible with ESP-Prog |
| J5 | various GPIOs or ADC and SPI, VCC, GND |
| J6 | GPIO (e.g., for WS2812, power via GPIO2) |
| Solder jumper | Purpose |
|---|---|
| LED_EN | Enable blue LED D1 controlled by GPIO12) |
| LDO_EN | Enable LDO (e.g., for power via USB-C) |
Build
Manufactured PCB
 |  |
|---|---|
| frontside rev 1.0 | backside rev 1.0 |
Assembled PCB
 |  |
|---|---|
| assembled front rev 1.0 | assembled back rev 1.0 |
Bill of materials (BOM)
| Designator | Manufacturer Part Number | Qty |
|---|---|---|
| J6, J2 | S3B-PH-SM4-TB(LF)(SN) | 2 |
| J1 | S4B-PH-SM4-TB(LF)(SN) | 1 |
| J3 | TYPE-C-31-M-12 | 1 |
| R1 | 10kΩ (0603) | 1 |
| R2 | 330Ω (0603) | 1 |
| D1 | LED (0603) | 1 |
| L1 | 1.6nH (0603) | 1 |
| C7 | 22uF (0603) | 1 |
| C6 | 0.1uf (0603) | 1 |
| C5, C3 | 0.1uF/25V (0603) | 2 |
| C4 | 10uF/6.3V (0603) | 1 |
| C2 | 2.7pF (0603) | 1 |
| C1 | 4.7pF (0603) | 1 |
| U1 | ESP32-PICO-D4 | 1 |
| U3 | XC6220B331MR-G | 1 |
Changelog
rev 1.2
- BREAKING CHANGE: J6 GPIOs reassigned to GPIO 32 and GPIO 33. GPIO 32 & 33 can be used as ADC1 channels.
rev 1.1
- FIX: U3's EN pin pulled to VCC
rev 1.0
- Initial PCB layout
Parts
23| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 0.1uF/25V | Capacitor_SMD:C_0603_1608Metric | C3, C5 |
| 2 | Conn_01x03_Male | Connector_JST:JST_PH_S3B-PH-SM4-TB_1x03-1MP_P2.00mm_Horizontal | J2, J6 |
| 2 | Jumper_NO_Small | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP2 |
| 1 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | 1.6nH | Inductor_SMD:L_0603_1608Metric | L1 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 10uF/6.3V | Capacitor_SMD:C_0603_1608Metric | C4 |
| 1 | 2.7pF | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | 22uF | Capacitor_SMD:C_0603_1608Metric | C7 |
| 1 | 330 | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 4.7pF | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | AN91445 | RF_Antenna:Texas_SWRA117D_2.4GHz_Left | U2 |
| 1 | Conn_01x04_Male | Connector_JST:JST_PH_S4B-PH-SM4-TB_1x04-1MP_P2.00mm_Horizontal | J1 |
| 1 | Conn_01x06_Male | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical_SMD | J4 |
| 1 | Conn_01x10_Male | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical_SMD_Pin1Left | J5 |
| 1 | ESP32-PICO-D4 | Package_DFN_QFN:QFN-48-1EP_7x7mm_P0.5mm_EP5.3x5.3mm | U1 |
| 1 | LED | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J3 |
| 1 | XC6220B331MR | Package_TO_SOT_SMD:SOT-23-5 | U3 |
The 22 most common of 23 parts.
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Questions
How big is the Esp32 cloud PCB?
It measures 50 × 30.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Esp32 cloud use?
23 parts, built around the ESP32-PICO-D4 and XC6220B331MR. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Esp32 cloud KiCad files?
From the oliverhanka/esp32_cloud_pcb repository on GitHub, at the commit this page was made from: the board is pcb/esp32_cloud.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Esp32 cloud design in my own project?
Its repository states no licence, so its author keeps all rights: ask oliverhanka before reusing the design.