ESP32-C3-MINI
ActiveESP32-C3 WiFi/BLE Smart Button Module
Espressif ESP32-C3 — the chip inside thousands of DIY smart buttons.
Common Applications
Not a button itself — the brain inside DIY smart buttons. Run ESPHome firmware and connect any physical button to create a custom WiFi or BLE smart button. Under $3 per module. Powers the maker/DIY smart home movement. More customizable than Zigbee buttons but requires programming. Found in custom home automation, art installations, and escape rooms.
Openness & Hackability
Custom firmware: ESPHome, Tasmota, Arduino, MicroPython, ESP-IDF
Fully open platform. Runs any firmware. Hardware schematics open source. The reference for DIY smart buttons.
Specifications
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Smart Home Integrations
Compatible smart home platforms and voice assistants.
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ESPHome, Home Assistant, MQTT, HTTP
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Max Operating Temp
Highest temperature the button is rated to operate in.
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105°C
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Min Operating Temp
Lowest temperature the button is rated to operate in.
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-40°C
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Protocol
The wireless communication standard. BLE = short range, phone direct. Zigbee = mesh network, needs hub. Z-Wave = mesh, needs hub. WiFi = direct, higher power.
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WiFi 2.4GHz + BLE 5.0
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Installation Quick Reference
Setup: Pair with your hub or phone via WiFi 2.4GHz + BLE 5.0. Most smart buttons support single press, double press, and long press for three different actions.
Battery: Uses CR2032 battery. Expected life: 1-2 years. Low battery notification via the app.
Dimensions
Troubleshooting
Not responding to input
Check wiring continuity with a multimeter. Verify the contact block is properly seated. Inspect terminals for loose connections.
Where to Buy
Price range
$2.46 — $25.07
across 2 distributors
Quick Specs
- Smart Home Integrations
- ESPHome, Home Assistant, MQTT, HTTP
- Max Operating Temp
- 105°C
- Min Operating Temp
- -40°C
- Protocol
- WiFi 2.4GHz + BLE 5.0
What People Are Saying
“Not a button itself — the brain inside DIY smart buttons. Run ESPHome firmware and connect any physical button to create a custom WiFi or BLE smart button. Under $3 per module. Powers the maker/DIY sm”