#include "pinout.h"
#include "measure.h"

Macros
#define	CLIENT_ADDRESS 1
	Our LoRa address.

#define	SERVER_ADDRESS 2
	The LoRa address of the base station.

#define	RF95_FREQ 915.0
	Radio frequency (in MHz). More...

Functions
void	lora_init (void)
	Initialize the LoRa radio. More...

void	build_msg (float flow, float temp, float maxtemp, int treeID=0)
	Builds a JSON string to send over LoRa. More...

void	send_msg (void)
	Sends a LoRa packet to the base station. More...

Macro Definition Documentation

◆ RF95_FREQ

#define RF95_FREQ 915.0

Radio frequency (in MHz).

Make sure this matches the radio you're communicating with. Also, be careful to stay in the ISM band so you aren't transmitting on a restricted channel without a license.

Function Documentation

◆ build_msg()

void build_msg	(	float	flow,
		float	temp,
		float	maxtemp,
		int	treeID = `0`
	)

Builds a JSON string to send over LoRa.

Builds a JSON string containing sapflow, weight, temperature, time, and tree ID. The string is stored in a global variable to be read by send_msg()

Parameters

flow	The calculated sapflow
temp	The baseline temperature of the tree
time	The date and time from the Real-Time Clock
treeID	the tree identification number

References rtc_ds.

◆ lora_init()

void lora_init ( void )

Initialize the LoRa radio.

This function turns on the radio, sets the frequency, and prepares it for use. It does not take any parameters.

Defaults after init are 434.0MHz, 13dBm, Bw = 125 kHz, Cr = 4/5, Sf = 128chips/symbol, CRC on

The default transmitter power is 13dBm, using PA_BOOST. If you are using RFM95/96/97/98 modules which uses the PA_BOOST transmitter pin, then you can set transmitter powers from 5 to 23 dBm:

References RFM95_CS, and RFM95_RST.

◆ send_msg()

void send_msg ( void )

Sends a LoRa packet to the base station.

Sends the string made by build_json() to the base station over LoRa. Calling this function without first calling build_msg() produces undefined behavior.

References RFM95_CS.