CR2S Reset & Teardown (FCC ID 2ANDL-CR2S)

Before you buy the Tuya Global CR2S, check what's inside.

The Tuya CR2S is a dual-mode module supporting both Wi-Fi and Bluetooth connectivity. It's designed for embedded applications requiring low power consumption and integration with the Tuya/Smart Life ecosystem.

⚠️ NOTE: Ensure correct battery polarity when installing batteries.

Quick Specs

Manufacturer: Tuya Global
Model: CR2S
Protocol: WiFi
Chipset: Realtek RTL8720
Ecosystem: Tuya / Smart Life
App: Smart Life

🔧 Geek Corner (Flashing Info)

Chipset: RTL8720CM
Flashable: ❌ No
Info: The RTL8720CM chipset typically does not support easy flashing with custom firmware like Tasmota or ESPHome due to proprietary bootloaders and lack of readily available tools.

User Manual

Scanned pages from the official user manual:

CR2S Manual

External Photos

Photos of the device exterior:

CR2S Exterior

Internal Photos

Teardown photos showing the PCB and components:

CR2S PCB

Verdict

The CR2S is a WiFi device from the Tuya / Smart Life ecosystem.

📄 Click to view full text manual (SEO)

CR2S Module Datasheet
Hardware Product Development > Network Modules > Wi-Fi & BLE
Dual Mode Module > CR Series Module
Version: 20210304
Online Version
Contents
Contents
1 Overview 2
1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3 Change history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Module interfaces 3
2.1 Dimensions and package . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Pin deﬁnition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Electrical parameters 6
3.1 Absolute electrical parameters . . . . . . . . . . . . . . . . . . . . . 6
3.2 Working conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.3 RF power consumption . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4 Working power consumption . . . . . . . . . . . . . . . . . . . . . . . 8
4 RF parameters 9
4.1 Basic RF features . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2 TX performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5 Antenna information 13
5.1 Antenna type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.2 Antenna interference reduction . . . . . . . . . . . . . . . . . . . . . 13
6 Packaging information and production instructions 14
6.1 Mechanical dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.2 Recommended PCB packaging . . . . . . . . . . . . . . . . . . . . . 14
6.3 Production instructions . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.4 Recommended oven temperature curve and temperature . . . . . . . 17
6.5 Storage conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7 MOQ and packaging information 20
8 Appendix: Statement 20
i
Contents
CR2S is a low-power embedded Wi-Fi+BLE module that T uya has developed. Embed-
ded with the Wi-Fi network protocol stack and rich library functions, it consists of a
highly integrated RF chip (RTL8720CM). With the maximum CPU clock rate of 100
MHz, CR2S also contains a low-power Real-M300 (KM4) microcontroller unit (MCU), a
WLAN MAC, a 1T1R WLAN, a 4-MB pseudo-static random-access memory (PSRAM),
4-MB ﬂash memory, and rich extensive peripherals.
1 / 22
1 OVERVIEW
1 Overview
CR2S is an RTOS platform that integrates all function libraries of the Wi-Fi MAC and
TCP/IP . Y ou can develop embedded Wi-Fi products as required.
1.1 Features
• Embedded low-power KM4 MCU, which can also function as an application pro-
cessor
Main clock rate: 100 MHz
• Working voltage: 3.0 to 3.6 V
• Peripherals: 6 (general-purpose input/output) GPIOs and 1 universal asyn-
chronous receiver/transmitter (UART)
• Wi-Fi/Bluetooth connectivity
– 802.11 B/G/N20
– Channels 1 to [email protected] GHz (CH1 to 11 for US/CA and CH1 to 13 for EU/CN)
– Support BLE (Bluetooth Low Energy) 4.2
– Support WEP, WPA, WPA2, and WPA2 PSK (AES) security modes
– MAX EIRP: + 20dBm output power in 802.11b mode
– Support S...