• Purpose
• Pin mapping
• Adapter
• PCB
• BOM
• Errata

Purpose

NodeMCU (left) and DoIt ESP32 DevKit (right), side by side:

Pin mapping

System

	1	2	3	4
NodeMCU	GND (x4)	3V3 (x3)	EN	VIN
DoIt ESP32 DevKit	GND (x2)	3V3	EN	VIN

GPIO. Bank 1. In use by SoftRF firmware.

	1	2	3	4	5	6	7	8	9	10	11	12	13
NodeMCU	D0	D1	D2	D3	D4	D5	D6	D7	D8	RX	TX	A0	SD3
DoIt ESP32 DevKit	D26	D25	D14	D23	D2	D5	D19	D27	D18	RX0	TX0	VP	D13

GPIO. Bank 2. Spare pins.

	1	2	3	4	5	6	7	8
NodeMCU	RSV1	RSV2	SD1	SD2	CLK	CMD	SD0	RST
DoIt ESP32 DevKit	RX2	TX2	D21	D22	D15	D4	D12	VN

UAV connector (optional). Residual ESP32 pins and GNSS/MAVLINK port.

	1	2	3	4	5	6	7
2	A0	D1	RX	TX	D3	GND	5V
1	3V3	GND	D32	D33	D34	D35	SD3

RF connector (optional). NRF905 or "SoftRF LoRa" port.

	1	2	3	4	5	6	7
2	D0	D2	D35	D34	D7	D8	GND
1	3V3	D4	NC	NC	D6	D5	GND

Adapter

It fits good enough for SoftRF Shield:

and for SoftRF Enclosure V4 as well:

PCB manufacturing

You can order the PCB direct from manufacturer: ¹

    

Estimated price for minimum 4 pcs of the PCB with basic international shipping included in is around 7 USD.

Expect to wait:

• 1 week for panelization
• 2 weeks for fabrication
• 1-2 weeks for delivery to your location

Alternatively you may pick these Gerber files and order the PCB from a local manufacturer of your preference.

¹ - SSL Cert error warning may come up - it is known to be safely ignored

Bill of materials

Number	Part	Qty	Picture	Source
1	PCB	1
2	1x40 female header 2.54mm	1		AliExpress
3	1x40 male header 2.54mm	1		AliExpress

Errata

Revision 1.1

Issue #1

Unable to update ESP32's firmware via micro USB when an I2C device is connected to SoftRF LoRa I2C port

Issue #2

Standalone Edition/ESP32 is unable to boot up when running on 2 fully charged AA Ni-Mh 1.2V batteries with DC-DC up-converter