Hi,

If you are facing problems with downlink and receiving this error:

```
* applicationID:"??"
* applicationName:"Application"
* deviceName:"????"
* devEUI:"????????????????"
* type:"DOWNLINK_GATEWAY"
* error:"TX_POWER"
* fCnt:19
* tags:{} 0 keys
* publishedAt:"2022-05-04T09:38:24.145558333Z"
```

You need to fix some configurations in the global_conf.json.

You need to enable all the TX power plans like bellow:

```
"tx_lut_0": {
/* TX gain table, index 0 */
"pa_gain": 0,
"mix_gain": 8,
"rf_power": -6,
"dig_gain": 0
},
"tx_lut_1": {
/* TX gain table, index 1 */
"pa_gain": 0,
"mix_gain": 10,
"rf_power": -3,
"dig_gain": 0
},
"tx_lut_2": {
/* TX gain table, index 2 */
"pa_gain": 0,
"mix_gain": 12,
"rf_power": 0,
"dig_gain": 0
},
"tx_lut_3": {
/* TX gain table, index 3 */
"pa_gain": 1,
"mix_gain": 8,
"rf_power": 3,
"dig_gain": 0
},
"tx_lut_4": {
/* TX gain table, index 4 */
"pa_gain": 1,
"mix_gain": 10,
"rf_power": 6,
"dig_gain": 0
},
"tx_lut_5": {
/* TX gain table, index 5 */
"pa_gain": 1,
"mix_gain": 12,
"rf_power": 10,
"dig_gain": 0
},
"tx_lut_6": {
/* TX gain table, index 6 */
"pa_gain": 1,
"mix_gain": 13,
"rf_power": 11,
"dig_gain": 0
},
"tx_lut_7": {
/* TX gain table, index 7 */
"pa_gain": 2,
"mix_gain": 9,
"rf_power": 12,
"dig_gain": 0
},
"tx_lut_8": {
/* TX gain table, index 8 */
"pa_gain": 1,
"mix_gain": 15,
"rf_power": 13,
"dig_gain": 0
},
"tx_lut_9": {
/* TX gain table, index 9 */
"pa_gain": 2,
"mix_gain": 10,
"rf_power": 14,
"dig_gain": 0
},
"tx_lut_10": {
/* TX gain table, index 10 */
"pa_gain": 2,
"mix_gain": 11,
"rf_power": 16,
"dig_gain": 0
},
"tx_lut_11": {
/* TX gain table, index 11 */
"pa_gain": 3,
"mix_gain": 9,
"rf_power": 20,
"dig_gain": 0
},
"tx_lut_12": {
/* TX gain table, index 12 */
"pa_gain": 3,
"mix_gain": 10,
"rf_power": 23,
"dig_gain": 0
},
"tx_lut_13": {
/* TX gain table, index 13 */
"pa_gain": 3,
"mix_gain": 11,
"rf_power": 25,
"dig_gain": 0
},
"tx_lut_14": {
/* TX gain table, index 14 */
"pa_gain": 3,
"mix_gain": 12,
"rf_power": 26,
"dig_gain": 0
},
"tx_lut_15": {
/* TX gain table, index 15 */
"pa_gain": 3,
"mix_gain": 14,
"rf_power": 27,
"dig_gain": 0
}
```

This is part of the configuration file for the EU868 region. You need to take care of your region’s regulations.