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HexGateway

gblach·HexGateway

HexGateway PCB layout, top view — open source ESP32 board by gblach
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About the HexGateway PCB

HexGateway is an open source ESP32 PCB design by gblach, published on GitHub. It is a 2-layer board measuring 50 × 48 mm, with 83 components from 43 distinct parts.

Its main chip is the esp32-c3, from the ESP32 family. Other key parts include the nRF52840, LM1117-3.3, SN74LV1T34DBV, MX25R3235FM2xx1 and ENC28J60x-SS. By type, the board carries 45 capacitors, 13 resistors, 6 ICs, 6 connectors, 6 inductors and 4 crystals.

It belongs with the iot & wireless designs in this gallery.

From the project

An internet gateway for Bluetooth LE, OpenThread and/or Zigbee devices.

It employs three chips: - nrf52840 - has support for Bluetooth LE, OpenThread and Zigbee networks. - esp32-c3 - has support for WiFi at 2.4GHz. - enc28j60 - has support for Ethernet network.

Note that U102 is required only if your are using esp32-c3 (U101) without built-in flash memory.

esp32-c3 (U101) can be programmed using ESP-Prog. This programmer must be connected to J101 (TagConnect) or J102 (IDC 6) connector.

HexGateway, from the project README
From the project README

Main components on the HexGateway

nRF52840LM1117-3.3SN74LV1T34DBVesp32-c3MX25R3235FM2xx1ENC28J60x-SS

HexGateway bill of materials (BOM)

83 components, 43 distinct parts.

QtyPartRefs
1
nRF52840
U1
1
LM1117-3.3
U2
1
SN74LV1T34DBV
U5
1
esp32-c3
U101
1
MX25R3235FM2xx1
U102
1
ENC28J60x-SS
U201
1
32MHz, 8pF, 40ppm
X1
1
32.768kHz, 9pF, 50ppm
X2
1
25MHz, 15/16pF
X201
1
40MHz, 15pF, 10ppm
Y101
1
Conn_02x05_Odd_Even
J2
2
Conn_Coaxial
J3, J103
1
USB4125-GF-A_REVA
J4
1
Conn_02x03_Odd_Even
J102
1
RJ45_Hanrun_HR911105A
J201
1
SW_Push
SW1
2
WS2812B
D1, D2
1
4.7nH, 5%
L1
2
10uH, 80mA, 20%
L2, L4
1
15nH, 10%
L3
Show 23 more
QtyPartRefs
1
2.0nH, (0.1nH), 450mA
L101
1
3.9nH
L102
4
12pF, NP0, 2%
C1, C2, C17, C18
1
0.8pF, NP0, 10%
C3
1
0.5pF, NP0, 10%
C4
15
100nF, X7R, 10%
C5, C7, C8, C12, C106, C107, C110, C112 +7
2
4.7uF, X7R, 10%
C6, C19
1
820pF, NP0, 5%
C9
1
100pF, NP0, 5%
C11
2
1.0uF, X7R, 10%
C14, C15
1
47nF, X7R, 10%
C16
5
10uF, 20%
C50, C51, C52, C105, C211
4
20pF
C101, C102, C220, C221
3
1uF, 20%
C103, C111, C150
3
10nF, 10%
C104, C206, C207
1
2.0pF
C108
1
1.5pF
C109
2
5.1k, 10%
R1, R2
1
499R, 1%, 1/20W
R102
3
10k, 1%
R108, R120, R150
1
2.32k, 1%
R201
4
50R, 1%
R202, R203, R204, R205
2
330R
R206, R207

HexGateway design files

The KiCad project lives in the gblach/HexGateway repository on GitHub; these links point at the commit this page was built from.

HexGateway: common questions

What microcontroller does the HexGateway use?

The HexGateway is built around the esp32-c3, from the ESP32 family.

How big is the HexGateway PCB?

The HexGateway measures 50 × 48 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the HexGateway?

83 components, from 43 distinct parts. The full bill of materials is listed on this page.

Where can I download the HexGateway design files?

From the gblach/HexGateway repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the HexGateway design in my own project?

The repository has no license, so all rights stay with gblach. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the HexGateway without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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