diff --git a/tools/btgatt-client.c b/tools/btgatt-client.c
index dec1a29..7b3c8ed 100644
--- a/tools/btgatt-client.c
+++ b/tools/btgatt-client.c
printf("Failed to initiate read long value procedure\n");
}
+static void write_value_usage(void)
+{
+ printf("Usage: write-value [options] <value_handle> <value>\n"
+ "Options:\n"
+ "\t-w, --without-response\tWrite without response\n"
+ "e.g.:\n"
+ "\twrite-value 0x0001 00 01 00\n");
+}
+
+static struct option write_value_options[] = {
+ { "without-response", 0, 0, 'w' },
+ { }
+};
+
+static void write_cb(bool success, uint8_t att_ecode, void *user_data)
+{
+ if (success) {
+ PRLOG("\nWrite successful\n");
+ } else {
+ PRLOG("\nWrite failed: 0x%02x\n", att_ecode);
+ }
+}
+
+static void cmd_write_value(struct client *cli, char *cmd_str)
+{
+ int opt, i;
+ char *argvbuf[516];
+ char **argv = argvbuf;
+ int argc = 1;
+ uint16_t handle;
+ char *endptr = NULL;
+ int length;
+ uint8_t *value = NULL;
+ bool without_response = false;
+
+ if (!bt_gatt_client_is_ready(cli->gatt)) {
+ printf("GATT client not initialized\n");
+ return;
+ }
+
+ if (!parse_args(cmd_str, 514, argv + 1, &argc)) {
+ printf("Too many arguments\n");
+ write_value_usage();
+ return;
+ }
+
+ optind = 0;
+ argv[0] = "write-value";
+ while ((opt = getopt_long(argc, argv, "+w", write_value_options,
+ NULL)) != -1) {
+ switch (opt) {
+ case 'w':
+ without_response = true;
+ break;
+ default:
+ write_value_usage();
+ return;
+ }
+ }
+
+ argc -= optind;
+ argv += optind;
+
+ if (argc < 1) {
+ write_value_usage();
+ return;
+ }
+
+ handle = strtol(argv[0], &endptr, 16);
+ if (!endptr || *endptr != '\0' || !handle) {
+ printf("Invalid handle: %s\n", argv[0]);
+ return;
+ }
+
+ length = argc - 1;
+
+ if (length > 0) {
+ if (length > UINT16_MAX) {
+ printf("Write value too long\n");
+ return;
+ }
+
+ value = malloc(length);
+ if (!value) {
+ printf("Failed to construct write value\n");
+ return;
+ }
+
+ for (i = 1; i < argc; i++) {
+ if (strlen(argv[i]) != 2) {
+ printf("Invalid value byte: %s\n",
+ argv[i]);
+ free(value);
+ return;
+ }
+
+ value[i-1] = strtol(argv[i], &endptr, 16);
+ if (endptr == argv[i] || *endptr != '\0'
+ || errno == ERANGE) {
+ printf("Invalid value byte: %s\n",
+ argv[i]);
+ free(value);
+ return;
+ }
+ }
+ }
+
+ if (without_response) {
+ if (!bt_gatt_client_write_without_response(cli->gatt, handle,
+ false, value, length)) {
+ printf("Failed to initiate write without response "
+ "procedure\n");
+ return;
+ }
+
+ printf("Write command sent\n");
+ return;
+ }
+
+ if (!bt_gatt_client_write_value(cli->gatt, handle, value, length,
+ write_cb,
+ NULL, NULL))
+ printf("Failed to initiate write procedure\n");
+
+ free(value);
+}
+
static void cmd_help(struct client *cli, char *cmd_str);
typedef void (*command_func_t)(struct client *cli, char *cmd_str);
{ "help", cmd_help, "\tDisplay help message" },
{ "services", cmd_services, "\tShow discovered services" },
{ "read-value", cmd_read_value,
- "\tRead a characteristic or descriptor Value" },
+ "\tRead a characteristic or descriptor value" },
{ "read-long-value", cmd_read_long_value,
"\tRead a long characteristic or desctriptor value" },
+ { "write-value", cmd_write_value,
+ "\tWrite a characteristic or descriptor value" },
{ }
};