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HTTP/2 301 date: Sun, 28 Dec 2025 15:37:14 GMT content-type: text/html location: https://hutscape.com/capsicum/ server: cloudflare x-github-request-id: 510A:36A0B4:7C8F82:8B9B5D:69514EAA accept-ranges: bytes age: 0 via: 1.1 varnish x-served-by: cache-bom-vanm7210036-BOM x-cache: MISS x-cache-hits: 0 x-timer: S1766936234.107946,VS0,VE197 vary: Accept-Encoding x-fastly-request-id: 90ea39feb237ff06e0ba3876538ff7ac5690c384 cf-cache-status: DYNAMIC nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800} report-to: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=n6DVqH9DQhZLDG%2FU8TEhDEhrDOQpacqhlvfZf6FYc4ykYsmUKzD2alHkqPREbvCs3htz7QL8ezPsnXBN0Fd1%2FuPX6otC0J2JagGFpw%3D%3D"}]} cf-ray: 9b5223463896ff75-BOM alt-svc: h3=":443"; ma=86400 HTTP/2 200 date: Sun, 28 Dec 2025 15:37:14 GMT content-type: text/html; charset=utf-8 server: cloudflare last-modified: Tue, 24 Dec 2024 11:01:23 GMT access-control-allow-origin: * expires: Sun, 28 Dec 2025 15:47:14 GMT cache-control: max-age=600 report-to: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=HeAQGfddMpIIa4Fm%2BKSOlI%2F1XBnmicpmrlKllL%2FoI1SQzVxoSvEStmmGNuSdYFYZQgtlgLXmNR6Pac0DX24SBoSPv%2BwdJWabqGPeoA%3D%3D"}]} x-proxy-cache: MISS x-github-request-id: A829:2D64E0:7B703D:8A7B3D:69514EAA nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800} age: 0 via: 1.1 varnish x-served-by: cache-bom-vanm7210089-BOM x-cache: MISS x-cache-hits: 0 x-timer: S1766936234.405397,VS0,VE218 vary: Accept-Encoding x-fastly-request-id: fbaa70066f9a6d04d3d3da7d4c1ebe274f335763 cf-cache-status: DYNAMIC content-encoding: gzip cf-ray: 9b5223485bfbff75-BOM alt-svc: h3=":443"; ma=86400 Capsicum | 🫑 A retrofitted wired audio doorbell with added WiFi connectivity 🔔

Capsicum

🫑 A retrofitted wired audio doorbell with added WiFi connectivity 🔔

power 16340

wireless WiFi

mcu ESP32-C3

ongoing since Oct 2023

Downloads

Demo Code Schematic Layout ECAD KiCad files Gerber files Bill of Materials FreeCAD file Case STL

Features

Turn off door bell audio based on time of the day E.g. sleeping
Add a timeout so that repeated door bell rings are not annoying
Connect to WiFi and send a webhook to Zapier for future integrations
(Fail-safe) Works like a normal doorbell without WiFi
(Integration) Turn on a light signal when the door bell rings and the sound is off E.g. in a Zoom call
(Integration) Send a mobile notification

Getting Started

Step 1

Teardown

Look into the internals of an existing wired battery-powered doorbell from FUERS bought on AliExpress, priced below USD $4.00.

FUERS Wired Guest Welcome Doorbell High Quality Energy-saving Door bell Simple Generous Home Store Security Doorbell Button

Battery

It is powered by 2 AAA batteries (3V).

Power by 2 AAA batteries

Step 2

Chip

Chip TLX210924 is similar to TQ33E-11. It rings “Ding Dong” 2 times. It is a Music chip with a built-in transistor positive trigger and has 6 pinouts from the PCB.

Chip of the original doorbell