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ESP32-C3-DEVKITM-1 Part Review

Status

Updated after corrective pass.

Reviewed Part Information

Project / part name: ESP32-C3-DEVKITM-1
Manufacturer: Espressif
MPN: ESP32-C3-DEVKITM-1
Part type: Evaluation Board
Description: ESP32-C3-MINI-1 based 2.4 GHz Wi-Fi / BLE development board with USB programming/power and two 15-pin headers.
Pin count in project: 30 terminals / 30 PCB pads
Datasheet URL: https://docs.espressif.com/projects/esp-dev-kits/en/latest/esp32c3/esp32-c3-devkitm-1/user_guide.html
Package metadata added: ESP32-C3-DevKitM-1 dev board, 2x15 2.54 mm headers
Package or Case Code added: DEVKIT-2X15-2.54MM
Mount: Through Hole
Connector metadata: 30 positions, 2 rows, 2.54 mm pitch

Official Source Used

Official Espressif ESP32-C3-DevKitM-1 user guide:

Key Specs

Core device: ESP32-C3-MINI-1 module on ESP32-C3-DevKitM-1 development board
Flash: 4 MB flash
Wireless: 2.4 GHz Wi-Fi 802.11 b/g/n and Bluetooth Low Energy
Processor: 32-bit RISC-V single core, up to 160 MHz
External headers: Two 15-pin header rows, J1 and J3, represented in Flux as a flattened 30-pin terminal set
Power pins: 3V3 pins on J1-2/J1-3, 5V pins on J1-13/J1-14, multiple GND pins
USB pins exposed: IO18 = USB_D−, IO19 = USB_D+
UART pins exposed: TX = GPIO21/U0TXD, RX = GPIO20/U0RXD
Special notes: GPIO2, GPIO8, and GPIO9 are strapping pins. GPIO8 also drives the on-board RGB LED.

Verified Pin Numbering

Pins 1–15 match Espressif header J1 pins 1–15 directly.

Pins 16–30 represent J3 in reverse physical order. This is consistent with the existing footprint/symbol mapping and the signal set:

Table

Flux pin	Signal	Official header pin/function
16	GND	J3-15: Ground
17	IO19	J3-14: GPIO19, USB_D+
18	IO18	J3-13: GPIO18, USB_D−
19	GND	J3-12: Ground
20	IO4	J3-11: GPIO4, ADC1_CH4, FSPIHD, MTMS
21	IO5	J3-10: GPIO5, ADC2_CH0, FSPIWP, MTDI
22	IO6	J3-9: GPIO6, FSPICLK, MTCK
23	IO7	J3-8: GPIO7, FSPID, MTDO
24	GND	J3-7: Ground
25	IO8	J3-6: GPIO8, RGB LED; strapping pin
26	IO9	J3-5: GPIO9; strapping pin
27	GND	J3-4: Ground
28	RX	J3-3: GPIO20, U0RXD
29	TX	J3-2: GPIO21, U0TXD
30	GND	J3-1: Ground

Corrective Changes Made

Added official Pin Description properties to all 30 terminals.
Confirmed the J3 side is intentionally reversed in Flux pin numbering: Flux 16 → J3-15 through Flux 30 → J3-1.
Corrected the ambiguous J3 GND descriptions at Flux pins 16 and 30.
Added missing package/mechanical metadata at project level.

Remaining Notes

The package metadata uses non-standard project-level property names because this is a published part project and the standard project property list does not include all component package fields.
The layout inspection confirms 30 pad nodes and an ESP32-C3-DevKitM-style footprint outline, but did not expose detailed pad coordinates in the tree response. The J3 numbering conclusion is based on the existing terminal pin numbers and official signal order.

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