roundly update

+ fact 1: we cannot use D1-D4 set. (D2 for LED, D4 for TXD1)
+ fact 2: using D5-D8 set again. (N.B. but to get proper stepping 
sequence w/ accelstepper lib. u need to CROSS D6 and D7 wiring, 
otherwise very poor torque & uni-directional not sane movements.)

roundly/platformio.ini

@@ -1,3 +1,13 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
 [platformio]
 default_envs = d1_mini_pro
 
@@ -5,27 +15,33 @@ default_envs = d1_mini_pro
 framework = arduino
 upload_speed = 921600
 upload_port =
-  /dev/ttyUSB0
-  /dev/tty.SLAB_USBtoUART
+	/dev/ttyUSB0
+	/dev/tty.SLAB_USBtoUART
 lib_deps =
-  SPI
-  Wire
-  64 ; ArduinoJson
-  1269 ; Painless Mesh
-  265 ; AccelStepper
+	SPI
+	Wire
+	64
+	1269
+	265
 
 [env:nodemcuv2]
 platform = espressif8266
 board = nodemcuv2
 lib_deps =
-  ${env.lib_deps}
-  ESP8266WiFi
+	${env.lib_deps}
+	ESP8266WiFi
 
 [env:d1_mini_pro]
 platform = espressif8266
 board = d1_mini_pro
 lib_deps =
-  ${env.lib_deps}
-  ESP8266WiFi
+	${env.lib_deps}
+	ESP8266WiFi
 upload_speed = 460800
-; 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
+
+[env:nanoatmega328_TEST]
+platform = atmelavr
+board = nanoatmega328
+lib_deps =
+	265
+upload_speed = 57600

roundly/src/main.cpp

@@ -199,6 +199,10 @@ void stepping() {
   float velocity = steps / dur * 1000;   // unit conv.: (steps/msec) --> (steps/sec)
   float speed = fabs(velocity);
   //
+  Serial.print("target_step --> "); Serial.println(target_step);
+  Serial.print("dur --> "); Serial.println(dur);
+  Serial.print("cur_step --> "); Serial.println(cur_step);
+  //
   if (speed > STEPS_PER_SEC_MAX) {
     Serial.println("oh.. it might be TOO FAST for me..");
   } else {
@@ -411,10 +415,10 @@ void setup() {
   randomSeed(analogRead(0));
 
   //stepper
-  pinMode(D5, OUTPUT);
-  pinMode(D6, OUTPUT);
-  pinMode(D7, OUTPUT);
-  pinMode(D8, OUTPUT);
+  // pinMode(D1, OUTPUT);
+  // pinMode(D2, OUTPUT);
+  // pinMode(D3, OUTPUT);
+  // pinMode(D4, OUTPUT);
   /// "
   /// The fastest motor speed that can be reliably supported is about 4000 steps per
   /// second at a clock frequency of 16 MHz on Arduino such as Uno etc.