HardLabs

IoT Messenger

PR77·IoT_Messenger·Hardware/IoT_Messenger.kicad_pcb

IoT Messenger PCB layout, top view — open source ESP8266 board by PR77
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About the IoT Messenger PCB

IoT Messenger is an open source ESP8266 PCB design by PR77, published on GitHub under the LGPL-3.0 license. It is a 2-layer board measuring 76.2 × 46.9 mm, with 58 components from 37 distinct parts.

Its main chip is the ESP-12F, from the ESP8266 family. Other key parts include the MCP73831-2-OT, LM1117-3.3 and DHT11. By type, the board carries 18 resistors, 16 capacitors, 5 connectors, 4 ICs, 4 switches and 4 LEDs.

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

From the project

IoT Messenger (Pager) For Simple 1 Way Communication

Interfacing with the device is via the Web using the simple HTTP Server class. The IoT Messenger sends out a webpage where the message and other functions can be accessed. As my HTML and JS skills are not up there, I have resorted to using CURL during development and debugging - HELP NEEDED! :)

There are 4 buttons for user input which can also be used for additional functions (see how Tetris and Dino game use them).

IoT Messenger, from the project README
From the project README

Main components on the IoT Messenger

MCP73831-2-OTLM1117-3.3DHT11ESP-12F

IoT Messenger bill of materials (BOM)

58 components, 37 distinct parts.

QtyPartRefs
1
MCP73831-2-OT
IC1
1
LM1117-3.3
IC2
1
DHT11
IC3
1
ESP-12F
IC4
1
Q_NPN_BEC
Q1
1
IRLML6402
Q2
1
DISP2
J1
1
I2C
J2
1
PROG
J3
1
SERIAL
J4
1
LED
J5
1
Buzzer
BZ1
1
USB_B_Micro
CONN1
2
500mA
F1, F2
1
MENU
SW1
1
UP
SW2
1
DOWN
SW3
1
ENTER
SW4
1
BATT
CONN2
1
SSD1306
DISP1
Show 17 more
QtyPartRefs
1
LED
LED1
1
PL9823
LED2
1
SS16
D1
2
4.7uF
C1, C2
3
10uF
C3, C4, C15
4
100nF
C5, C6, C12, C14
5
1uF
C7, C8, C9, C13, C16
2
4.7uF
C10, C11
1
470R
R1
1
2K
R2
1
220K
R3
4
4K7
R4, R7, R8, R13
4
10K
R5, R14, R16, R17
1
560K
R6
4
100K
R9, R10, R11, R18
1
330K
R12
1
62K
R15

IoT Messenger design files

The KiCad project lives in the PR77/IoT_Messenger repository on GitHub; these links point at the commit this page was built from.

IoT Messenger: common questions

What microcontroller does the IoT Messenger use?

The IoT Messenger is built around the ESP-12F, from the ESP8266 family.

How big is the IoT Messenger PCB?

The IoT Messenger measures 76.2 × 46.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the IoT Messenger?

58 components, from 37 distinct parts. The full bill of materials is listed on this page.

Where can I download the IoT Messenger design files?

From the PR77/IoT_Messenger repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the IoT Messenger design in my own project?

Yes, under the terms of its LGPL-3.0 license, which PR77 chose for the repository.

Can I test firmware for the IoT Messenger without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP8266 firmware against it before you order a PCB.

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