1 files changed, 34 insertions, 0 deletions
diff --git a/code/esp32/components/eos/cell_ussd.c b/code/esp32/components/eos/cell_ussd.c
new file mode 100644
index 0000000..2daa00f
--- /dev/null
+++ b/code/esp32/components/eos/cell_ussd.c
@@ -0,0 +1,34 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <esp_log.h>
+
+#include "at_cmd.h"
+#include "cell.h"
+#include "gsm.h"
+
+static char cmd[256];
+
+void eos_cell_ussd_handler(unsigned char mtype, unsigned char *buffer, uint16_t size) {
+    int cmd_len, rv;
+
+    rv = eos_modem_take(1000);
+    if (rv) return;
+
+    buffer += 1;
+    size -= 1;
+    switch (mtype) {
+        case EOS_CELL_MTYPE_USSD_REQUEST:
+            if (size == 0) return;
+
+            buffer[size] = '\0';
+            cmd_len = snprintf(cmd, sizeof(cmd), "AT+CUSD=1,\"%s\",15\r", buffer);
+            if ((cmd_len < 0) || (cmd_len >= sizeof(cmd))) return;
+            at_cmd(cmd);
+
+            break;
+    }
+
+    eos_modem_give();
+}
+