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Telegram doorman

jctots·telegram-doorman·kicad/telegram-doorman.kicad_sch

Telegram doorman

About the Telegram doorman PCB

Telegram doorman is an open source ESP8266 PCB design by jctots, published on GitHub under the GPL-3.0 license. It is a board, with 23 components from 16 distinct parts.

Its main chip is the WEMOS_D1_MINI, from the ESP8266 family. Other key parts include the LM393, PC817 and TSR_1-2450. By type, the board carries 7 resistors, 5 ICs, 5 capacitors, 4 connectors, 1 transistor and 1 inductor.

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

From the project

ESP8266-based smart doorbell bridge — control and monitor your TCS/Koch intercom via Telegram Bot with multi-user support and event notifications

Currently supported TCS bus events: - send open door command (up to two doors) - receive notifications for open door - receive notifications for intercom call - receive notifications for apartment doorbell - receive notifications during lift handset

Other hardware-specific features: - possible isolation of TCS BUS and ESP circuit via optocoupler when ESP is powered by separate supply - possible de-isolation of TCS BUS and ESP circuit via jumper when ESP is powered by TCS bus P-Line - separate pin for resetting config to defaults (short-to-ground)

Main components on the Telegram doorman

WEMOS_D1_MINILM393PC817TSR_1-2450

Telegram doorman bill of materials (BOM)

23 components, 16 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
WEMOS_D1_MINI
WeMos_D1_mini
U1
1
LM393
U2
2
PC817
U3, U4
1
TSR_1-2450
U5
1
2N3904
Q1
1
CONN_01X03_PIN
Conn_01x03_Pin
J1
3
CONN_01X02_PIN
Conn_01x02_Pin
J2, J3, J4
1
56UH
56uH
L1
2
0.1UF
0.1uF
C1, C5
3
10UF
10uF
C2, C3, C4
1
22K
22k
R1
2
10K
10k
R2, R4
1
33K
33k
R3
1
4.7K
4.7k
R5
1
3.3K
3.3k
R6
1
330
R7

Telegram doorman design files

The KiCad project lives in the jctots/telegram-doorman repository on GitHub; these links point at the commit this page was built from.

Telegram doorman: common questions

What microcontroller does the Telegram doorman use?

The Telegram doorman is built around the WEMOS_D1_MINI, from the ESP8266 family.

How many components are on the Telegram doorman?

23 components, from 16 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 Telegram doorman design files?

From the jctots/telegram-doorman repository on GitHub, which has the schematic and the BOM; the links under Design files point to each one.

Can I use the Telegram doorman design in my own project?

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

Can I test firmware for the Telegram doorman 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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