Back to Case Studies
Smart HomeRobotics & Drones
Emberly
Voice-Activated Smart Mug powered by ESP32-C3
Temperature-controlled mug responsive to voice.
Battery Life
30+ Days
Inference Latency
<150ms
Emberly
Plan A — Quick Facts
MCU
ESP32-C3 (RISC-V Wi-Fi/BLE)
Heater Technology
24W Kapton Polyimide + MOSFETs
Control Algorithm
FreeRTOS PID Loop
Waterproofing
IPX7 Potting Compound
Client
A lifestyle brand developing a temperature-controlled ceramic mug with smart home voice integration.
Challenge
Fitting a Wi-Fi MCU, a battery management system (BMS), and a high-power heating element into the waterproof base of a ceramic mug.
Product Concept & Architecture
The ESP32-C3 (RISC-V, Wi-Fi/BLE) was chosen for its excellent thermal efficiency and small QFN package. It controls a custom MOSFET array driving a 24W Kapton polyimide heater.
Engineering Solution
We designed a custom 4-layer circular PCB. The ESP32-C3 monitors a high-precision NTC thermistor using its internal ADC. We implemented a PID control loop in FreeRTOS to maintain liquid temperature exactly at the user's setpoint without overshooting. The Wi-Fi connects to an AWS IoT backend for Alexa/Google Home voice control.
Result
Maintains liquid at 135°F for 1.5 hours on battery. IPX7 waterproof (fully washable). PID algorithm keeps temperature within ±1°F.
Project Profile
Services Delivered
Hardware DesignEmbedded Software
Core Technologies
Wi-Fi/BluetoothTinyMLRTOS
Silicon & Vendors
EspressifJieliZhongke Lanxun
Need similar outcomes?
Let's discuss how ChipTalk can deliver results for your next project.
Tell us about your project.
Fast Response — Initial feedback within 48 hours
Full R&D Lifecycle — From feasibility to mass production
Extensive Experience — 500+ projects across 15 verticals
Rapid MVP Validation — Prototype in as fast as 12 weeks
Portfolio
