Send a text to device on ENTER with `send_on_enter` filter // Resolve #926

HISTORY.rst

@@ -22,8 +22,9 @@ PlatformIO Core 4
 
   - Added **PlatformIO Device Monitor Filter API** (dev-platforms can extend base device monitor with a custom functionality, such as exception decoding) (`pull #3383 <https://github.com/platformio/platformio-core/pull/3383>`_)
   - Configure project device monitor with `monitor_filters <https://docs.platformio.org/page/projectconf/section_env_monitor.html#monitor-filters>`__ option
-  - Show a timestamp for each new line with ``time`` filter (`issue #981 <https://github.com/platformio/platformio-core/issues/981>`_)
   - `Capture device monitor output to a file <https://docs.platformio.org/page/core/userguide/device/cmd_monitor.html#capture-output-to-a-file>`__ with ``log2file`` filter (`issue #670 <https://github.com/platformio/platformio-core/issues/670>`_)
+  - Show a timestamp for each new line with ``time`` filter (`issue #981 <https://github.com/platformio/platformio-core/issues/981>`_)
+  - Send a text to device on ENTER with ``send_on_enter`` filter (`issue #926 <https://github.com/platformio/platformio-core/issues/926>`_)
 
 * Added support for Arm Mbed "module.json" ``dependencies`` field (`issue #3400 <https://github.com/platformio/platformio-core/issues/3400>`_)
 * Improved support for Arduino "library.properties" ``depends`` field

platformio/commands/device/filters/send_on_enter.py

@@ -0,0 +1,31 @@
+# Copyright (c) 2014-present PlatformIO <contact@platformio.org>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from platformio.commands.device import DeviceMonitorFilter
+
+
+class SendOnEnter(DeviceMonitorFilter):
+    NAME = "send_on_enter"
+
+    def __init__(self, *args, **kwargs):
+        super(SendOnEnter, self).__init__(*args, **kwargs)
+        self._buffer = ""
+
+    def tx(self, text):
+        self._buffer += text
+        if "\r\n" in self._buffer:
+            text = self._buffer
+            self._buffer = ""
+            return text
+        return ""