The Pill by Shelly

Device identification

Device name: The Pill by Shelly
Device model: S3SN-0U53X
Device SSID: ShellyPill-XXXXXXXXXXXXXX
Bluetooth ID: 0x1829

Short description

The Pill by Shelly is a compact multi-purpose low-voltage Wi-Fi & Bluetooth device, powered by only 5V via USB-C. The small form factor allows it to fit conveniently into any space-constraint environment.

The device is ready to use for Temperature monitoring with Plug and play compatibility with external Temperature sensors (DS18B20) or Temperature & Humidity (DHT22). Additionally, supporting wide variety of digital or analog sensors and low-voltage actuators with external peripheral addons and configurable peripheral modes.

Main features

Compact design
USB-C powered (5V)
Dual connectivity (WiFi & Bluetooth)
Plug and play: Temperature monitoring (DS18B20/DHT22)
Advanced peripheral modes - Digital Input/Output; Analog input (Voltage meter);
External Peripheral Add-ons: SSR Dual-channel, Analog Voltage measurement (0-30V)
Shelly Gen3 capabilities (Local actions, Schedules, Scripting, Virtual components)
Bluetooth Gateway for Shelly BLU devices
3rd party integrations-ready (MQTT, WebSocket, HTTP)

Peripheral modes

Temperature (DS18B20) - Supporting up to 5 x Temperature probes (DS18B20); + optional 2 Digital IO
Temperature & Humidity - 1x Temperature & Humidity sensor DHT22 + optional 2 Digital IO
Analog Input - Analog sensor input (voltmeter) + optional Digital IO. Measured Voltages: 0-2.5 V (default); external Add-on for 0-30V
Digital Input/Output - configurable for up to 3x Inputs/Outputs ; Digital IO: 3.3 V Logic Levels; Digital input: Active Low (default).
Solid State Relay Add-on - Peripheral Addon with 2x channels galvanic-isolated outputs (max 30 V / 300 mA) + optional Digitial IO

* Note: Digital I/O can be combined with all modes and setup independently as Input or Output

Use cases

Water Temperature Monitoring
Track temperature of pools, aquariums, water tanks and reservoirs with simultaneous monitoring of up to five temperature points, using external temperature sensor probes (DS18B20)
Temperature and Humidity Monitoring
Monitor temperature and humidity in a room, server cabinets, greenhouse, warehouses or other areas where keeping optimal environment condition is necessary, with the supported external sensor DHT22
Digital Sensors Readings
Connect simple digital sensors like door reed, motion, water state sensor to your home automation system
DC Voltage monitoring - external Add-on available
Monitor DC voltages up to 30 V with the external Analog 0-30 V Add-on, suitable for tracking voltage across various battery systems (3.7 V, 12 V, 24 V) or other DC power lines.
Analog Sensor measurements - external Add-on available
Analog sensor voltage measuring for popular hobby & industrial analog sensors with the available Analog 0-30 V Add-on
Control DC Loads - external Add-on available
Dual-channel control for small DC Loads up to 30 V / 300 mA like led indicators, small fans, solenoids, valves and etc. with additionally available external SSR Add-on
External Systems Control
Available Digital Input/Outputs allow switching and reading state of external controllers and systems (3.3V logic level). The optionally available SSR Add-on allows triggering inputs of external controllers (max 30 V / 300 mA).

Main applications

Residential
University/college
Hobby

Integrations

…

Simplified internal schematics

Device electrical interfaces

Power supply

USB-C power supply: +5 V⎓

Add-on interface

DC Power Supply: +5 V⎓
Input/Output 1 - Configurable:
- 1-Wire (DS18B20, DHT22)
- Digital Input
- Digital Output
- Analog Input (Voltmeter)
Input/Output 2 - Configurable:
- Digital Input
- Digital Output
Input/Output 3 - Configurable:
- Digital Input
- Digital Output
GND

Connectivity and protocols

Wi-Fi
Bluetooth

User interface

Inputs

One (Control) button
- Press and hold for 5 seconds to enable Device access point and Bluetooth connection.
- Press and hold for 10 seconds to factory reset the Device.

Outputs

LED (monocolor) indication
- AP (Access Point) enabled and Wi-Fi disabled:
  1 second ON / 1 second OFF
- Wi-Fi enabled, but not connected to a Wi-Fi network:
  1 second ON / 3 seconds OFF
- Connected to a Wi-Fi network:
  Constantly ON
- Cloud is enabled, but not connected:
  1 second ON /5 seconds OFF
- Connected to Shelly Cloud:
  Constantly ON
- OTA (Over the Air Update):
  ½ sec ON / ½ second OFF
- Button pressed and held for 5 seconds:
  ½ second ON / ½ second OFF
- Button pressed and held for 10 seconds:
  ¼ second ON / ¼ second OFF

The list above starts with the initial device status and the lowest priority. Every next state cancels the previous one.

Specifications

Quantity	Value
Physical
Size (HxWxD):	26 x 19.95 x 8.5 mm / 1.02 x 0.79 x 0.34 inch
Weight:	3 g / 0.11 oz
Shell material:	Plastic
Shell color:	White
Environmental
Ambient working temperature:	-20 to 40 °C / -5 to 105 °F
Humidity:	30 % - 70 % RH
Electrical
Power supply:	5 V⎓ (from USB Type-C port)
Power consumption:	< 1 W
Input circuits ratings
Digital inputs triggering voltage:	Active LOW; Trigger low: < 0.83 V Trigger high: > 2.48 V
Digital inputs max. voltage	3.3 V
Output circuits ratings
Max. switching voltage:	3.3 V (logic-level)
Max. switching current:	20 mA
Sensors, meters
Voltmeter (DC)	0 V - 2.5 V (Built-in) 0 V - 30 V (Requires external Addon)
Voltmeter accuracy:	±(2% + 5d)
Internal-temperature sensor:	No
External sensors supported:	single DHT22 up to five DS18B20
Radio
Wi-Fi
Protocol:	802.11 b/g/n
RF band:	2401 - 2483 МHz
Max. RF power:	< 20 dBm
Range:	Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors (Depends on local conditions)
Bluetooth
Protocol:	BLE 4.2
RF band:	2402 - 2480 МHz
Max. RF power:	< 10 dBm
Range:	Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors (Depends on local conditions)
Microcontroller unit
CPU:	Shelly ESP32 C3 (ESP-Shelly-C38F)
Flash:	8MB
Firmware capabilities
Schedules:	20
Webhooks (URL actions):	20 with 5 URLs per hook
Scripting:	Yes
MQTT:	Yes
Encryption:	Yes
Other:	Supported Accessories: Cable adapter - 3.5mm Jack (incl. in the package) Spliter 1 to 5 - 3.5mm Jack Temeprature sensor DS18B20 - 3.5mm jack Supported add-ons: 5-terminal Add-on SSR Add-on Analog 0-30V Add-on