diff --git a/esp32/mods/modlte.c b/esp32/mods/modlte.c
index 5afdc7e9c..3ed5f756e 100644
--- a/esp32/mods/modlte.c
+++ b/esp32/mods/modlte.c
@@ -1279,8 +1279,34 @@ STATIC mp_obj_t lte_send_at_cmd(mp_uint_t n_args, const mp_obj_t *pos_args, mp_m
     }
     if (MP_OBJ_IS_STR_OR_BYTES(args[0].u_obj))
     {
+        uint32_t timeout = LTE_RX_TIMEOUT_MAX_MS;
         size_t len;
-        lte_push_at_command_ext((char *)(mp_obj_str_get_data(args[0].u_obj, &len)), args[1].u_int, NULL, len);
+        char* command = (char *)(mp_obj_str_get_data(args[0].u_obj, &len));
+
+        if(argLength > 1) {
+            timeout = args[1].u_int;
+        }
+
+        if(len <= LTE_AT_CMD_DATA_SIZE_MAX)
+          lte_push_at_command_ext_cont(command, timeout, NULL, len, false);
+        else {
+            size_t chunk_count = len / LTE_AT_CMD_DATA_SIZE_MAX;
+            size_t remaining_bytes = len % LTE_AT_CMD_DATA_SIZE_MAX;
+
+            bool expect_continuation = false;
+            char* chunk_start = command;
+            for(size_t i=0; i<chunk_count; ++i) {
+                expect_continuation = (i < (chunk_count - 1)) || remaining_bytes;
+
+                lte_push_at_command_ext_cont(chunk_start, timeout, NULL, LTE_AT_CMD_DATA_SIZE_MAX, expect_continuation);
+
+                chunk_start += LTE_AT_CMD_DATA_SIZE_MAX;
+            }
+
+            if(remaining_bytes) {
+                lte_push_at_command_ext_cont(chunk_start, timeout, NULL, remaining_bytes, false);
+            }
+        }
     }
     else
     {