add uart_mitm component

components/uart_mitm/README.md

@@ -0,0 +1,11 @@
+# component that acts as a mitm for two uart ports
+
+Two configured uarts are required.
+
+Example:
+```yaml
+uart_mitm:
+  uart1: uart1
+  uart2: uart2
+```
+

components/uart_mitm/__init__.py

@@ -0,0 +1,29 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import uart
+from esphome.const import CONF_ID
+
+DEPENDENCIES = ['uart']
+
+serial_ns = cg.esphome_ns.namespace('serial')
+
+UARTMITM = serial_ns.class_('UARTMITM', cg.Component)
+
+CONF_UART1 = "uart1"
+CONF_UART2 = "uart2"
+
+CONFIG_SCHEMA = cv.COMPONENT_SCHEMA.extend({
+    cv.GenerateID(): cv.declare_id(UARTMITM),
+    cv.Required(CONF_UART1): cv.use_id(uart.UARTComponent),
+    cv.Required(CONF_UART2): cv.use_id(uart.UARTComponent),
+})
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    await cg.register_component(var, config)
+
+    uart1 = await cg.get_variable(config[CONF_UART1])
+    cg.add(var.set_uart1(uart1))
+    uart2 = await cg.get_variable(config[CONF_UART2])
+    cg.add(var.set_uart2(uart2))

components/uart_mitm/uart_mitm.cpp

@@ -0,0 +1,24 @@
+#include "uart_mitm.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace serial {
+
+static const char *const TAG = "uart_mitm";
+
+void UARTMITM::loop() {
+  uint8_t c;
+  while (this->uart1_->available()) {
+    this->uart1_->read_byte(&c);
+    this->uart2_->write_byte(c);
+  }
+  while (this->uart2_->available()) {
+    this->uart2_->read_byte(&c);
+    this->uart1_->write_byte(c);
+  }
+}
+
+void UARTMITM::dump_config() { ESP_LOGCONFIG(TAG, "UART MITM"); }
+
+}  // namespace serial
+}  // namespace esphome

components/uart_mitm/uart_mitm.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/uart/uart.h"
+
+namespace esphome {
+namespace serial {
+
+class UARTMITM : public Component {
+ public:
+  float get_setup_priority() const override { return setup_priority::LATE; }
+  void loop() override;
+  void dump_config() override;
+  void set_uart1(uart::UARTComponent *uart) { this->uart1_ = uart; }
+  void set_uart2(uart::UARTComponent *uart) { this->uart2_ = uart; }
+
+ protected:
+  uart::UARTComponent *uart1_;
+  uart::UARTComponent *uart2_;
+};
+
+}  // namespace serial
+}  // namespace esphome