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#include <string.h>
#include <zephyr/device.h>
#include <zephyr/drivers/lora.h>
#include <zephyr/kernel.h>
#include <zephyr/shell/shell.h>
#include <zephyr/sys/util.h>
#define DEFAULT_RADIO_NODE DT_ALIAS(lora0)
BUILD_ASSERT(DT_NODE_HAS_STATUS(DEFAULT_RADIO_NODE, okay),
"Board has no LoRa modem");
const struct device *const lora_dev = DEVICE_DT_GET(DEFAULT_RADIO_NODE);
#define LOG_LEVEL CONFIG_LOG_DEFAULT_LEVEL
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(lora);
static struct lora_modem_config modem_config = {
.frequency = 433175000,
.bandwidth = BW_125_KHZ,
.datarate = SF_10,
.preamble_len = 8,
.coding_rate = CR_4_5,
.iq_inverted = false,
.public_network = false,
.tx_power = 4,
.tx = true
};
void lora_rx_cb(const struct device *dev, uint8_t *data, uint16_t size,
int16_t rssi, int8_t snr)
{
ARG_UNUSED(dev);
ARG_UNUSED(size);
LOG_INF("rx: %s (RSSI: %d dBm, SNR: %d dBm)", data, rssi, snr);
}
void lora_tx_cb(const struct shell *sh, size_t argc, char *argv[])
{
if (argc != 2) {
LOG_ERR("lora_tx requires exactly one argument");
return;
}
modem_config.tx = true;
int ret = lora_config(lora_dev, &modem_config);
if (ret < 0) {
shell_error(sh, "LoRa config to TX mode failed");
return;
}
lora_recv_async(lora_dev, NULL);
ret = lora_send(lora_dev, argv[1], strlen(argv[1]));
if (ret < 0) {
LOG_ERR("LoRa send failed");
return;
}
LOG_INF("tx: %s", argv[1]);
modem_config.tx = false;
ret = lora_config(lora_dev, &modem_config);
if (ret < 0) {
shell_error(sh, "LoRa config to RX mode failed");
return;
}
lora_recv_async(lora_dev, lora_rx_cb);
}
SHELL_CMD_ARG_REGISTER(tx, NULL, "send via LoRa", lora_tx_cb, 2, 0);
int main(void)
{
if (!device_is_ready(lora_dev)) {
LOG_ERR("%s Device not ready", lora_dev->name);
return 0;
}
int ret = lora_config(lora_dev, &modem_config);
if (ret < 0) {
LOG_ERR("LoRa config failed");
return 0;
}
lora_recv_async(lora_dev, lora_rx_cb);
k_sleep(K_FOREVER);
return 0;
}
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