From dd03583a279495e4c8831c269a9df6531f1f152e Mon Sep 17 00:00:00 2001
From: mattmcw <matt@sixteenmillimeter.com>
Date: Tue, 4 Jul 2023 18:45:51 -0400
Subject: [PATCH] Proof of concept works. Nano can proxy requests to ESP32 via
 soft serial and then receives confirmation after event. Nano has a cleaner
 serial interface and will not throw junk into mcopy app serial listener.

---
 .gitignore                                |  4 +++-
 notes/esp32_serial/esp32_serial.ino       |  3 ++-
 notes/nano_softserial/nano_softserial.ino | 26 ++++++++++++++++-------
 3 files changed, 23 insertions(+), 10 deletions(-)

diff --git a/.gitignore b/.gitignore
index 6834386..6a38cd6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,4 +5,6 @@
 node_modules
 dist
 
-*.svd
\ No newline at end of file
+*.svd
+*debug_custom.json
+*debug.cfg
\ No newline at end of file
diff --git a/notes/esp32_serial/esp32_serial.ino b/notes/esp32_serial/esp32_serial.ino
index 64757c7..c2a2b62 100644
--- a/notes/esp32_serial/esp32_serial.ino
+++ b/notes/esp32_serial/esp32_serial.ino
@@ -20,6 +20,7 @@ void loop () {
     }
 
     if (cmd == 'x') {
-        Serial2.print('x');
+        Serial2.print(cmd);
     }
+    cmd = 'z';
 }
diff --git a/notes/nano_softserial/nano_softserial.ino b/notes/nano_softserial/nano_softserial.ino
index a7840bf..6b4c59e 100644
--- a/notes/nano_softserial/nano_softserial.ino
+++ b/notes/nano_softserial/nano_softserial.ino
@@ -5,26 +5,36 @@
 
 SoftwareSerial softPort(SOFTWARE_RX, SOFTWARE_TX);
 
+volatile char proxy = 'z';
 volatile char cmd = 'z';
-volatile long now;
-volatile long start;
+
 
 void setup () {
+    Serial.begin(57600);
     softPort.begin(9600);
-    start = millis();
     pinMode(LED_BUILTIN, OUTPUT);
 }
-
+//////
+// Sending an x character to the nano over
+// Serial will proxy it to the ESP32 over SoftSerial
+// which will reflect it back to the Nano
+// and will turn on the built-in LED. Proof of
+// concept round trip
+//////
 void loop () {
-    now = millis();
+    if (Serial.available() > 0) {
+        proxy = Serial.read();
+        softPort.print(proxy);
+    }
     if (softPort.available() > 0) {
         cmd = softPort.read();
     }
+    if (cmd != 'z') {
+        Serial.println(cmd);
+    }
     if (cmd == 'x') {
         digitalWrite(LED_BUILTIN, HIGH);
     }
-    if (now >= start + 5000) {
-        softPort.print('x');
-    }
+    cmd = 'z';
 }