add RPC sample

Author: twendtland

.github/workflows/build-samples.yml

@@ -35,3 +35,7 @@ jobs:
       - name: Build Attributes Sample
         run: |
           west build --pristine -b nrf9160dk/nrf9160/ns thingsboard/samples/attributes
+
+      - name: Build RPC Sample
+        run: |
+          west build --pristine -b nrf9160dk/nrf9160/ns thingsboard/samples/rpc

samples/rpc/CMakeLists.txt

@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(rpc-sample)
+
+target_sources(app PRIVATE src/main.c)
+
+target_compile_options(app PRIVATE
+    -Wall
+    -Werror
+    -Wno-unused-parameter
+)

samples/rpc/prj.conf

@@ -0,0 +1,32 @@
+CONFIG_LOG=y
+CONFIG_SHELL=y
+CONFIG_SHELL_MINIMAL=y
+CONFIG_COAP_INIT_ACK_TIMEOUT_MS=4000
+
+# Cellular connectivity
+CONFIG_NRF_MODEM_LIB=y
+CONFIG_NRF_MODEM_LIB_LOG_FW_VERSION_UUID=y
+CONFIG_LTE_LINK_CONTROL=y
+CONFIG_LTE_NETWORK_MODE_LTE_M_NBIOT=y
+CONFIG_LTE_MODE_PREFERENCE_LTE_M=y
+CONFIG_LTE_PSM_REQ=y
+CONFIG_LTE_EDRX_REQ=y
+CONFIG_NET_SOCKETS_OFFLOAD=y
+
+# Requirements for Thingsboard SDK
+CONFIG_COAP=y
+CONFIG_NETWORKING=y
+CONFIG_NET_IPV4=y
+CONFIG_NET_SOCKETS=y
+CONFIG_JSON_LIBRARY=y
+CONFIG_FLASH=y
+CONFIG_FLASH_MAP=y
+CONFIG_NVS=y
+CONFIG_SETTINGS=y
+
+# Thingsboard SDK
+CONFIG_THINGSBOARD=y
+CONFIG_THINGSBOARD_USE_PROVISIONING=n
+# Set server name and access token
+# CONFIG_COAP_SERVER_HOSTNAME=""
+# CONFIG_THINGSBOARD_ACCESS_TOKEN=""

samples/rpc/src/main.c

@@ -0,0 +1,71 @@
+#include <thingsboard.h>
+
+#include <modem/lte_lc.h>
+#include <modem/nrf_modem_lib.h>
+#include <zephyr/kernel.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/settings/settings.h>
+#include <zephyr/shell/shell.h>
+
+#include <string.h>
+
+LOG_MODULE_REGISTER(main);
+
+static struct tb_fw_id fw_id = {
+	.fw_title = "rpc-sample", .fw_version = "v1.0.0", .device_name = "sample-device"};
+
+int main(void)
+{
+	int err = 0;
+
+	LOG_INF("Initializing modem library");
+	err = nrf_modem_lib_init();
+	if (err) {
+		LOG_ERR("Failed to initialize the modem library, error (%d): %s", err,
+			strerror(-err));
+		return err;
+	}
+
+	err = lte_lc_func_mode_set(LTE_LC_FUNC_MODE_ACTIVATE_LTE);
+	if (err) {
+		LOG_ERR("Failed to activate LTE");
+		return err;
+	}
+
+	LOG_INF("Connecting to LTE network");
+	err = lte_lc_connect();
+	if (err) {
+		LOG_ERR("Could not establish LTE connection, error (%d): %s", err, strerror(-err));
+		return err;
+	}
+	LOG_INF("LTE connection established");
+
+	LOG_INF("Connecting to Thingsboards");
+	err = thingsboard_init(NULL, &fw_id);
+	if (err) {
+		LOG_ERR("Could not initialize thingsboard connection, error (%d) :%s", err,
+			strerror(-err));
+		return err;
+	}
+}
+
+static void rpc_callback(const uint8_t *data, size_t len)
+{
+	LOG_HEXDUMP_INF(data, len, "RPC repsonse: ");
+}
+
+static int cmd_do_rpc(const struct shell *shell, size_t argc, char **argv)
+{
+	int err;
+
+	const char *params = "{\"name\":\"gcx\"}";
+	err = thingsboard_rpc("hello", rpc_callback, params);
+	if (err) {
+		LOG_ERR("Could not send RPC, error (%d): %s", err, strerror(-err));
+		return err;
+	}
+
+	return 0;
+}
+
+SHELL_CMD_REGISTER(rpc, NULL, "Send a RPC request", cmd_do_rpc);