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Mathias Clauszen
Mathias Clauszen vor 3 Stunden
Hallo Russin Sir Bullar, about the non worling oled, i think they kindly asked you to contact costummer service so they may can arrange a new OLED for you. About the firmware, the arduino IDE is for precompiled hex files simply not build, and far from perfect ( won't say it's one of the worst things to programm an avr but it's defnitly in the top 10 ). Besides this some more about the way to get new firmware to the station: The atmega32u4 has a leonardo compatabile bootloader onboard. If you connect to the USB device with 2400 baud, the bootloder will get started and the board, afterwards the avrdude can send new firmware to the board. Thats what the given avrdude line is basically doing. On a linux system that won't be COM1 but /dev/ttyACM0. For teh faulty OLED, if the avr reacts to serial commands this simply means the OLED was dead on arrival and you need a new OLED. For the soldering station you also need to be aware that the display is not running in i²C mode. The station uses the SPI mode with following pin defines:OLED_CS 12OLED_DC 14OLED_CLK 15OLED_DATA 16OLED_RESETso you need at least four channels on your scope for data analyses. But seeing signals on SCL and SDA is expect the avr is sending data to the screen. Also note there is no way that the avr gets any response if the display actually got any data send, meaning, if the display is dead it will simply not able to detect if it is showing anything or not. For the serial communication you can also use CuteCom ( Ubuntu has it as packet ) and connect to the station. On Windows it will be plug and play, on ubuntu you have to deal with the user right for the serial ports and also in some versions arround 18.x there are some problems that the user will get no permisson to serial ports, even if he is in the dialout group ( something in the udev rules was broken ). If the connection is possible you can at least rule out tht the avr may is in some bad state. Also you have on the PCB a 6 pin connector ( 2x3 ) near the AVR. This is the  ISP header, so you can attatch a avr programmer of choise and flash the hex file directly to the mcu if you like to. I hope this will at least help a little. I wish you a nice weekend and i hope you'll have a working station soon. Best Regards Mathias  
180348 DIY soldering station
Russin Sir Bullar
Russin Sir Bullar vor 7 Stunden
Is it possible to use Arduino IDE  to upload teh PRECOMPILED hex-file ?If you use the Arduino IDE you don't need to do this, because the IDE does it all for you. But HOW do I load the HEX-file ?? into the IDE ?? How is it done ?  I read somewhere:Re: uploading hex-file using IDE ? #3Jul 25, 2011, 04:30 am Hold down the shift key when uploading a sketch. You will see all the commands used to compile, link, and upload the hex file that is produced. Practice using those commands to compile, link, and upload code that you do have the source for. Then, use the upload command to upload the hex file that you do not have the source for.Is that true ?  Is it that easy ?  I tried the :  You simply can connect the station with a usb cable to the pc and use the arduino ide integrated terminal for the commands. and I got very little information - in fact NONE about the faulty OLED-display.  
180348 DIY soldering station
Rainer Schuster
Rainer Schuster vor 8 Stunden
Hello Ivo, R1 and R2 are 100 Ohms each.  
HV Power supply with tube and semiconductor curve tracer
Kishor Kumar
Kishor Kumar vor 10 Stunden
Adding SD card will be a good upgrade…adding an NB-Iot modem will be wonderful!  
ESP32 Weather Station (180468)
DON W
DON W vor 1 Tag
And the plot thickens.. After giving the board a once over and heating up a few connections that didn't look bad/cold, but, just were not as "clean" as I'd like them to be, I decided to take another look, as had been suggested, at the power issue. I didn't see anything on the board that would suggest this issue was a cold solder joint that was intermittent or in some way causing a problem. I'm pretty sure I had verified my adapter was supplying a steady solid 9 VDC, but, much to my surprise (among other reactions), I was seeing the output drifting from as low as 7.2 V up to about 8.8...never reaching 9, and definitely not the stability of a regulated power adapter. Those reading were just with my DVM monitoring, so who knows how much this thing could have been varying under any kind of load. And as erratic as it behaved, makes me wonder if it was fluctuating enough to cause the ESP32 to behave erratically. If this is the root cause, the question of why it only happened in sleep mode, I have no idea, but I'll trade not understanding what exactly triggered the issue for a stable clock. I dug up another 9VDC/500 ma supply from my drawer full of power supplies, its running on that one now, we'll see how it behaves over the next week or so.
6-digit VFD Clock with ESP32