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ESP32 LORA Chat

jharvey·ESP32_LORA_Chat

ESP32 LORA Chat PCB layout, top view — open source ESP32 board by jharvey
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About the ESP32 LORA Chat PCB

ESP32 LORA Chat is an open source ESP32 PCB design by jharvey, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 121.9 × 101.6 mm, with 222 components from 58 distinct parts.

Its main chip is the ESP32, from the ESP32 family. Other key parts include the MCP73831T-2ACI/OT, TP4056, FS8205A, DW01 and RT9013. By type, the board carries 53 resistors, 46 test points, 38 switches, 38 capacitors, 17 ICs and 9 connectors.

It belongs with the rf & radio, displays & leds and power & battery designs in this gallery.

From the project

ESP32 based LORA chat box.

front | back | PCB --- | --- | --- | | 3D model for enclosure found here https://cad.onshape.com/documents/2eca9b71ceb843e60ebed659/w/deaed59ddef0917efb45d1fe/e/0c98206fb1ddff68e078d781

ESP32 LORA Chat, from the project README
From the project README

Main components on the ESP32 LORA Chat

MCP73831T-2ACI/OTTP4056ESP32FS8205ADW01RT9013RFM69HCWTP4056_KOREANHROPARTSELECTYPE-C-31-M-12PCA9555PWBGU8019C482342LM75BATGM336H-5N31QMC5883LC11092CP2102N-AXX-XQFN28

ESP32 LORA Chat bill of materials (BOM)

222 components, 58 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MCP73831T-2ACI/OT
U1
1
TP4056
U2
1
ESP32
U3
1
FS8205A
U4
1
DW01
U5
1
RT9013
U6
1
RFM69HCW
U7
2
TP4056_KOREANHROPARTSELECTYPE-C-31-M-12
tp4056_KoreanHropartsElecTYPE-C-31-M-12
U8, U25
1
PCA9555PW
U9
1
BGU8019
U18
1
C482342
BUZZER
U19
1
LM75B
U20
1
ATGM336H-5N31
U21
1
QMC5883L
U22
1
C11092
FPCConn
U23
1
CP2102N-AXX-XQFN28
CP2102N-Axx-xQFN28
U24
1
C15127
Q_PMOS_DGS
Q1
1
BSS123
Q2
1
SI1308
Si1308
Q3
2
C49581
Q_NPN_BEC
Q4, Q5
Show 38 more
QtyPartRefs
1
C411575
uFL
X1
6
CONN_021X02_NO_SILK
J1, J2, J3, J6, J7, J9
2
CONN_01
J4, J5
1
C585350
Micro_SD_Card_Det
J8
1
C962215
Antenna
AE1
1
C88374
Conn_Coaxial
AE2
1
18650
BT1
1
TA1661A
FL1
36
PB22
S1, S2, S3, S4, S5, S6, S7, S8 +28
1
SW_DIP_X01
SW_DIP_x01
SW1
1
C136144
SW_Push_DPDT
SW2
46
CONN_01
TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8 +38
1
C434432
GRN
GRN1
1
C84262
ORG
ORG1
1
C84256
RED
RED1
5
MBR0530
D1, D2, D3, D4, D5
1
6.2NH
6.2nH
L1
1
68UH
68uh
L2
1
6.8NH
6.8nH
L3
16
1u
C1, C3, C6, C10, C15, C22, C23, C25 +8
9
100N
100n
C2, C8, C11, C13, C17, C21, C24, C33 +1
7
10U
10u
C4, C5, C7, C9, C12, C19, C36
1
1.2P
1.2p
C14
1
6.8P
6.8p
C16
1
1n
C18
2
4.7UF
4.7uF
C20, C34
1
220N
220n
C35
13
10K
R1, R2, R3, R4, R7, R9, R12, R14 +5
3
5K1
R5, R19, R50
5
1K
R6, R8, R22, R46, R53
20
C21189
0R
R10, R15, R16, R20, R21, R25, R26, R27 +12
1
100
R11
2
50K
R13, R17
2
1K5
R23, R24
1
0R47
R38
1
DNP
10K DNP
R45
2
22K1
R47, R48
3
C2907556
0R
R49, R51, R52

ESP32 LORA Chat design files

The KiCad project lives in the jharvey/ESP32_LORA_Chat repository on GitHub; these links point at the commit this page was built from.

ESP32 LORA Chat: common questions

What microcontroller does the ESP32 LORA Chat use?

The ESP32 LORA Chat is built around the ESP32, from the ESP32 family.

How big is the ESP32 LORA Chat PCB?

The ESP32 LORA Chat measures 121.9 × 101.6 mm, has 4 copper layers and is 1.62 mm thick.

How many components are on the ESP32 LORA Chat?

222 components, from 58 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the ESP32 LORA Chat design files?

From the jharvey/ESP32_LORA_Chat repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the ESP32 LORA Chat design in my own project?

Yes, under the terms of its GPL-3.0 license, which jharvey chose for the repository.

Can I test firmware for the ESP32 LORA Chat 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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