When selecting a remote assisted development kit, you need to comprehensively evaluate hardware and software support based on project requirements (such as communication distance, power consumption, protocol compatibility, development difficulty, etc.). The following are key reference data and selection steps:

I. Core Reference Data

1. Hardware Parameters

Communication Protocol: Bluetooth version (BLE 4.2/5.0/5.2/5.3), support for Classic Bluetooth or Mesh
Transmission Range: Theoretical range in open air (affected by power and antenna)
Transmit Power: Affects range and power consumption, usually adjustable (e.g., +8dBm)
Receiver Sensitivity: Higher sensitivity indicates greater range (e.g., 97dBm @ 1Mbps)
Interface Type: Interface for communication with the host controller (UART/SPI/I2C/USB)
Power Consumption: Operating/Sleep Current (determines battery life)
Antenna Options: PCB antenna/External IPEX antenna/Ceramic antenna
Operating Temperature: Industrial grade (40°C–85°C) or consumer grade (0°C–70°C)

2. Software Support

Protocol Stack: Whether the protocol stack is built-in (e.g., Nordic SoftDevice)
AT Command Set : Whether standardized AT commands are provided (simplifies development).
SDK/Sample Code: Development resources provided by the manufacturer or module vendor (such as GitHub examples, Keil/IAR projects).
Debugging Tools: Supported tool chains (such as JLink for debugging Nordic chips and TI's XDS110).
Cloud Platform Compatibility: Cloud platform compatibility.

3. Certification and Compliance

RF Certification: FCC/CE/SRRC (Domestic Radio Model Approval), etc.
Bluetooth Certification: BQB certification (ensures protocol compatibility).

II. Selection Steps

1. Identify the Requirement Scenario

Short-range sensor: Bluetooth LE 5.0 with low power consumption (such as the E104BT50).
Long-range control: Bluetooth LE 5.2 with long-range mode and an external antenna (such as the E104BT5032A).
Multi-device networking: Mesh-compatible modules (such as those based on the nRF52840).
Audio transmission: Dual-mode Bluetooth (classic Bluetooth + Bluetooth LE), such as the E104BT54).

2. Evaluate Development Resources

Rapid prototyping: Choose AT command firmware (no programming required, controlled via serial port).
Deep customization: Choose a chip with an open SDK (such as Nordic's nRF Connect SDK).
Ecosystem compatibility: Prioritize mainstream chips (Nordic/TI > domestic Telink).

3. Key Comparison Examples

III. Recommended Development Kits

1. Basic Evaluation Kit

Model: E104BT50 Development Board (Includes USB-to-UART Tool)
Purpose: Quickly test AT commands and communication functions.

2. Advanced Development Kit

Model: nRF52840 DK (Nordic official development board) + E104BT5032A module
Purpose: Mesh networking or long-distance application development.

3. Cloud Connection Kit

Model: Ebyte Bluetooth Gateway + Tencent Cloud IoT SDK
Purpose: Enable transparent data transmission between devices and the cloud.