ESP8266 + NRF24L01 test for line of sight for 350 meters with Yagi antenna at server side:

Send-Receive success with data rate at 250 kbps and Transmit Power 0 dBm.

driver.setRF(driver.DataRate250kbps, driver.TransmitPower0dBm);

Server sketch on Google Drive:
[ Ссылка ]

Client sketch on Google Drive:
[ Ссылка ]


Data rate at 250 kbps is enough for this application. It will be used only to monitor and control a 2500 watts water pump.

Antenna bought from Lazada. Price 243 Thai Baht or about 7 US$

2.4GHz】(25dBi) RP-SMA Directional Outdoor Wireless Yagi Antenna WiFi Aluminium Alloy Wifi Outdoor Antenna For Router

[ Ссылка ]

Specification:
Frequency: 2400 - 2500MHz
Gain: 25 dBi
VSWR: 1.8:1 max
Polarization Type: Linear Vertical
Input Impedance: 50 Ohms
Connector Type: RP-SMA

With SMA Male Plug to SMA Female RP-SMA Male to RP-SMA Female RF Adapter Connector
[ Ссылка ]

More information:

ESP8266 NRF24L01 Wifi Gateway with Arduino NRF24L01 Node
[ Ссылка ]

Complete Guide for nRF24L01 – 2.4GHz RF Transceiver Module With Arduino
[ Ссылка ]

The nRF24L01 - Wireless Joystick for Arduino Robot Car with nRF24L01+
[ Ссылка ]

Have a nice day.
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