Compatibility & Integration Notes

UART Interface – Baud Rate Tolerance

The module uses a fixed baud rate of 115200 baud for UART communication. The integrated microcontroller is clocked by a high-precision crystal oscillator (HFXO). The resulting baud rate deviation is less than ±0.002 %.

For error-free communication, the counterpart may have its own deviation of up to ±2.0 %. The combined baud rate difference between transmitter and receiver must not exceed ±4 %, otherwise bit shifts or frame errors may occur.

We therefore recommend that the counterpart also operates with a crystal-stabilised clock source or that the baud rate is configured such that the actual deviation reliably remains below ±2 %.

Conformity and Approvals

The YUKI Module A1 is a preconfigured radio module that meets the requirements for operation in the European Union. It has been tested according to the relevant European directives and carries the CE marking.

Compliance with European Standards

The module meets the requirements of the following harmonised standards:

• EN 62368-1: Safety of audio/video, information and communication technology equipment
• EN 301 489-1, -17, -52: EMC requirements for radio equipment (incl. LTE, GNSS, BLE)
• EN 300 328: Radio equipment operating in the 2.4 GHz band (e.g. Bluetooth)
• EN 301 908-13: Radio equipment for mobile communication (LTE Cat M1, NB-IoT)
• EN 50665: Assessment of human exposure for body-worn and handheld devices
• EN 18031-1: Common security requirements for radio equipment: Part 1: Radio equipment with internet connection

Environmental and Material Compliance

This product is manufactured in compliance with the following environmental regulations:

• Regulation (EC) No. 1907/2006 (REACH) – No substances of very high concern (SVHC) above 0.1 % by mass according to the current ECHA candidate list

CE Marking

The YUKI Module A1 is CE-marked and fulfils the essential requirements of:

• Directive 2014/53/EU (RED) – Radio Equipment Directive
• Directive 2011/65/EU (RoHS II) – Restriction of hazardous substances

Notes on System Integration

The CE marking of the module applies exclusively to the module in the form tested by the manufacturer. When integrating it into an end product, it must be ensured that:

• no changes are made to the antenna configuration,
• the mechanical installation environment complies with the tested exposure conditions (e.g. minimum distances),
• additional EMC sources (e.g. switching regulators, motors) are appropriately decoupled.

Responsibility for conformity of the overall system lies with the device manufacturer.

Further Declarations of Conformity

Documents on conformity and test certificates can be requested from ImagineOn technical support.