Hi @petewill

Thanks a lot for your suggestion (nice picture BTW)

This is exactly the way i (used to) do. But sadly it doesn't work anymore. I can only upload sketches with VCC connected and external power source disconnected. (what would be the outcome in case i leave FTDI's Vcc AND external power source connected to Pro Mini?)

So it is for now impossible to get the serial monitor feedback while using the node in real-life condition...

@boozz

doubling cable = doubling resistance = doubling voltage drop

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sorry
don't throw stones at me, it's only a joke

Hi @gohan

2x AA. Same as before. I tried new batteries to be sure

Hi @rejoe2

Thanks a lot for your reply

That is indeed a starting point, thank you very much

Your explanations sounds a bit like foreign language to me this problem will hopefully take my knowledge one step up as i have never faced the need to play with "bootloader", "fota" and friends

I sure will keep you updated about my findings!

Hi,

I am having trouble uploading sketch to Pro Mini.

This is new behaviour as it used to work a few weeks ago.

I am using this board : https://www.ebay.com/itm/FT232RL-3-3V-5-5V-FTDI-USB-to-TTL-Serial-Adapter-Module-for-Arduino-Mini-Port/381374421597?epid=502148532&hash=item58cbafda5d:g:jk8AAOSwrklVMjIp

Works fine when it powers the Arduino (ie all 6 pins connected between FTDI and ProMini)

In a fairly recent past i could also upload sketch when having the ProMini powered via an external power source. In that particular case, i would not connect the Vcc pin of arduino to FTDI board, and still power the arduino via its "normal" power source (batteries). Serial monitor would aslo behave perfectly.

I have spent some time lately working on hardware (aluminum and carbon baby!) for MySensor project... now that it's time to put all that to life i am facing that problem : no more uploading with external power source.

Same result with Win10 computer and Ubuntu16 laptop.

What would happen in case i keep ProMini still powered via batteries while plugging FTDI board WITH Vcc ? (i do that with Uno and Mega but i know for sure these are designed this way. Not sure about Pro Mini though)

Thanks a lot for your input

Best Regards

FT232RL 3.3V 5.5V FTDI USB to TTL Serial Adapter Module for Arduino Mini Port

$1.86

12992 available

@neverdie just a thought
One is able to customise a program header and footer of GCode programs
Maybe you could use a “coolant off” and “coolant on” (M07, M08 and M09 if I remember correctly) to achieve your goal?

Hi guys

I am in the process of automating my central heating system (network gas boiler for heaters and tap water)

A part of this project is to use a RC servo to control the thermostat knob

Rotation of the knob has to be done much slower than the average servo speed

Using delay() in sketches in order to slow down servo travel is a non-sense

I tried VarSpeedServo library : but servo movement wasn't neat and it looks like it's using delay()...

So i wrote that little bit of sketch:

#include <Servo.h>
Servo myservo;  // create servo object to control a servo
#define servoMin 10
#define servoMax 170
int servoTarget = 90;               // incoming serial data - servo target position
int servoPos    = 90;               // actual servo position
unsigned long servoDelay = 1000;    // time delay between 2 servo position increments
unsigned long servoPrevMillis;

void setup() {
  myservo.attach(9);    // attaches the servo on pin 9 to the servo object
  Serial.begin(9600);   // opens serial port, sets data rate to 9600 bps
  Serial.print("Servo at ");
  Serial.println(servoTarget);
  myservo.write(servoTarget);
}

void loop() {
  if (Serial.available() > 0)  {
    servoTarget = Serial.parseInt();
    Serial.print("I received: ");
    Serial.println(servoTarget);
  }
  if ( (servoTarget != servoPos)
       && (servoTarget < servoMax) && (servoTarget > servoMin)
       && ( (millis() - servoPrevMillis) >= servoDelay) ) {
    if ( servoTarget > servoPos )
      servoPos++;
    else
      servoPos--;
    myservo.write(servoPos);
    delay(10);                     // wait for the servo to get there
    Serial.println(servoPos);
    servoPrevMillis = millis();
  }
}

As i am quite happy with the result i though i would share it!

@linkos that’s art mate! Very very nice

Acetone "steam" or just rubbing ? Or both ?

Congrats, pure Apple design looks gorgeous

@dbemowsk Echo's family members only speak english and german so far...