how to set the transmission power level?

Question

Hi,
We have a custom board with nrf51822 and we use chip antenna from ST BAL-NRF01D3, now the distance it support is very very short (less than 20 cm). So, please tell me, changing the transmission power level will increase the distance it support or not? if it is so, tell me, how to configure the transmission power level? and the rssi value we are getting is -88db. 
 Regards,
Balaji

Håkon Alseth · Accepted Answer

Hi, 
 20 cm of range is very short. Normal range in 0 dBm is usually 10-15 meters in an office environment.
Can you post your gerber files, so I can have a look at your layout? 
 If you do not want to disclose your design to everyone, I would recommend that you create a case in the technical support page ("My Page" ) on our main site. 
 To answer your original question:
If you're using the S110 API, its the function call "sd_ble_gap_tx_power_set()" (defined in ble_gap.h).
If not, then it's NRF_RADIO->TXPOWER = (int8_t) x; 
 Best regards
Håkon