LAUNCHXL-CC1350: Contiki webdemo MQTT Range issue

Hi,

We are working with CC1350 US Launchpads to create a mesh network (with webdemo code in Nodes and slip radio in Router)and send data via MQTT. But we are getting very poor range (max 40 Meter Line of Sight). We have changed the smart rf settings for 915 MHz and also changed frequency and RSSI thresholds.

Please check the following configurations that we are using,

#ifdef PROP_MODE_CONF_RSSI_THRESHOLD
#define PROP_MODE_RSSI_THRESHOLD PROP_MODE_CONF_RSSI_THRESHOLD
#else
#define PROP_MODE_RSSI_THRESHOLD 0x9C
#endif

#ifdef DOT_15_4G_CONF_FREQUENCY_BAND_ID
#define DOT_15_4G_FREQUENCY_BAND_ID DOT_15_4G_CONF_FREQUENCY_BAND_ID
#else
#define DOT_15_4G_FREQUENCY_BAND_ID DOT_15_4G_FREQUENCY_BAND_915
#endif

/* CMD_PROP_RADIO_DIV_SETUP */
rfc_CMD_PROP_RADIO_DIV_SETUP_t smartrf_settings_cmd_prop_radio_div_setup =
{
.commandNo = 0x3807,
.status = 0x0000,
.pNextOp = 0, // INSERT APPLICABLE POINTER: (uint8_t*)&xxx
.startTime = 0x00000000,
.startTrigger.triggerType = 0x0,
.startTrigger.bEnaCmd = 0x0,
.startTrigger.triggerNo = 0x0,
.startTrigger.pastTrig = 0x0,
.condition.rule = 0x1,
.condition.nSkip = 0x0,
.modulation.modType = 0x1,
.modulation.deviation = 0x64,
.symbolRate.preScale = 0xF,
.symbolRate.rateWord = 0x8000,
.rxBw = 0x24,
.preamConf.nPreamBytes = 0x3,
.preamConf.preamMode = 0x0,
.formatConf.nSwBits = 0x20,
.formatConf.bBitReversal = 0x0,
.formatConf.bMsbFirst = 0x1,
.formatConf.fecMode = 0x0,
.formatConf.whitenMode = 0x0,
.config.frontEndMode = 0x0,
.config.biasMode = 0x1,
.config.analogCfgMode = 0x0,
.config.bNoFsPowerUp = 0x0,
.txPower = 0xAB3F,
.pRegOverride = overrides,
.centerFreq = 0x0393,
.intFreq = 0x8000,
.loDivider = 0x05,
};

static uint32_t overrides[] =
{
// override_use_patch_prop_genfsk.xml
// PHY: Use MCE ROM bank 4, RFE RAM patch
MCE_RFE_OVERRIDE(0,4,0,1,0,0),
// override_synth_prop_863_930_div5.xml
// Synth: Set recommended RTRIM to 7
HW_REG_OVERRIDE(0x4038,0x0037),
// Synth: Set Fref to 4 MHz
(uint32_t)0x000684A3,
// Synth: Configure fine calibration setting
HW_REG_OVERRIDE(0x4020,0x7F00),
// Synth: Configure fine calibration setting
HW_REG_OVERRIDE(0x4064,0x0040),
// Synth: Configure fine calibration setting
(uint32_t)0xB1070503,
// Synth: Configure fine calibration setting
(uint32_t)0x05330523,
// Synth: Set loop bandwidth after lock to 20 kHz
(uint32_t)0x0A480583,
// Synth: Set loop bandwidth after lock to 20 kHz
(uint32_t)0x7AB80603,
// Synth: Configure VCO LDO (in ADI1, set VCOLDOCFG=0x9F to use voltage input reference)
ADI_REG_OVERRIDE(1,4,0x9F),
// Synth: Configure synth LDO (in ADI1, set SLDOCTL0.COMP_CAP=1)
ADI_HALFREG_OVERRIDE(1,7,0x4,0x4),
// Synth: Use 24 MHz XOSC as synth clock, enable extra PLL filtering
(uint32_t)0x02010403,
// Synth: Configure extra PLL filtering
(uint32_t)0x00108463,
// Synth: Increase synth programming timeout (0x04B0 RAT ticks = 300 us)
(uint32_t)0x04B00243,
// override_phy_rx_aaf_bw_0xd.xml
// Rx: Set anti-aliasing filter bandwidth to 0xD (in ADI0, set IFAMPCTL3[7:4]=0xD)
ADI_HALFREG_OVERRIDE(0,61,0xF,0xD),
// override_phy_gfsk_rx.xml
// Rx: Set LNA bias current trim offset to 3
(uint32_t)0x00038883,
// Rx: Freeze RSSI on sync found event
HW_REG_OVERRIDE(0x6084,0x35F1),
// override_phy_gfsk_pa_ramp_agc_reflevel_0x1a.xml
// Tx: Configure PA ramping setting (0x41). Rx: Set AGC reference level to 0x1A.
HW_REG_OVERRIDE(0x6088,0x411A),
// Tx: Configure PA ramping setting
HW_REG_OVERRIDE(0x608C,0x8213),
// override_phy_rx_rssi_offset_5db.xml
// Rx: Set RSSI offset to adjust reported RSSI by +5 dB
(uint32_t)0x00FB88A3,
// TX power override
// Tx: Set PA trim to max (in ADI0, set PACTL0=0xF8)
ADI_REG_OVERRIDE(0,12,0xF8),
(uint32_t)0xFFFFFFFF,
};

Please let me know if we are missing something or doing something wrong. Also what is the maximum range that we can achieve with CC1350 running contiki?

Thanks

Rahul