It is possible to solder a RF cable to WT32i-A with appropriate modifications for RF testing. This article is going to let you know how to modify WT32i-A (internal chip antenna) and solder a RF cable on it.
The following diagrams show the schematic and PCB layout of the antenna section of the module.
1. Remove ANT1 and C1
2. Replace L2 by a 0ohm resistor
3. Solder a RF cable to the pad #1 of ANT and the GND
Bluetest3, which is an application software for Windows, can be used to control the module for RF testing.For detailed test setup and procedure, please refer to <<Bluetest3: Certification test setup and procedures>>