HardLabs

Iguana

iowlabs·Iguana·hardware/PCB/Iguana_V1.kicad_pcb

Iguana PCB layout, top view — open source ESP32 board by iowlabs

About the Iguana PCB

Iguana is an open source ESP32 PCB design by iowlabs, published on GitHub. It is a 2-layer board measuring 80 × 50 mm, with 112 components from 59 distinct parts.

Its main chip is the ESP32-WROOM-32D, from the ESP32 family. Other key parts include the DW01, TP4056, MT3608, FS8205A and AP2112K-3.3. By type, the board carries 35 resistors, 21 capacitors, 18 connectors, 14 diodes, 12 ICs and 4 transistors.

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

From the project

Repositorio para proyecto Iguana IOWLabs (Cultivo)

Iguana is a LoRa sensor for Smart Cities. It is an instrument designed to monitor soil temperature and humidity in real time. It is a low-cost device designed to address a wide range of scenarios. It has connectivity to different types of wireless networks (LoRa, Bt, BLE, Wifi, RF), adapting to a large number of IoT applications.

The PCB was designed with various scenarios in mind that contemplate the common needs associated with automatic irrigation, smart agriculture and soil quality monitoring. Both at the level of domestic applications and at the level of industrial applications.

Iguana, from the project README
From the project README

Main components on the Iguana

DW01TP4056MT3608FS8205AAP2112K-3.3MAX3485CH340CESP32-WROOM-32DRV-8803RFM95W-915S2

Iguana bill of materials (BOM)

112 components, 59 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
DW01
U1
1
TP4056
U2
1
MT3608
U3
1
FS8205A
U4
3
AP2112K-3.3
U5, U6, U8
1
MAX3485
U7
1
CH340C
U9
1
ESP32-WROOM-32D
U10
1
RV-8803
U11
1
RFM95W-915S2
U12
2
Q_PMOS_GSD
Q1, Q2
1
Q_Dual_NPN_NPN_BRT_E1B1C2E2B2C1
Q3
1
BSS138
Q4
1
BAT
J1
1
HDR-2x1
J2
3
IN
J3, J18, J19
1
Cap. Moisture Sensor
J4
1
ds18b20
J5
1
SHT31
J6
1
NPK/H Sensor
J7
Show 39 more
QtyPartRefs
1
ON OFF
J8
1
HDR-3x1
J9
1
OLED
J10
1
rgb led
J11
1
USB_B_Micro
J12
1
HDR-2x1
J13
1
Conn_01x02
J14
1
~
J15
1
Conn_Coaxial
J17
1
Battery_Cell
BT1
1
FUSE
F1
1
SolderJumper_3_Open
JP1
1
SolderJumper_2_Open
JP2
3
SW_DIP_x02
SW1, SW2, SW3
8
LED
D1, D2, D4, D5, D6, D7, D10, D12
3
D_Schottky
D3, D8, D9
1
BAS70-05
D11
1
WS2812B
D14
1
CD4148W
D15
1
22u
L1
2
22u
C1, C5
6
100n
C2, C13, C14, C15, C16, C20
4
10u
C3, C4, C17, C18
2
4.7u
C6, C21
6
1u
C7, C8, C9, C10, C11, C12
1
10n
C19
7
1k
R1, R4, R6, R10, R11, R12, R23
1
100
R2
1
1K2
R3
1
7K5
R5
1
12K
R7
1
470
R8
1
30K
R9
12
10K
R13, R14, R17, R18, R19, R20, R21, R22 +4
1
4.7K
R15
1
120
R16
1
330
R27
5
3.3k
R28, R29, R30, R31, R32
2
100k
R33, R34

Iguana design files

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

Iguana: common questions

What microcontroller does the Iguana use?

The Iguana is built around the ESP32-WROOM-32D, from the ESP32 family.

How big is the Iguana PCB?

The Iguana measures 80 × 50 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Iguana?

112 components, from 59 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 Iguana design files?

From the iowlabs/Iguana 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 Iguana design in my own project?

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

Can I test firmware for the Iguana 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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