Legal Removal Request

Post: My [b]/boot/cmdline.txt[/b] currently looks like this [pre][code]root=/dev/mmcblk0p7 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait[/code][/pre] [b]/boot/config.txt[/b] [pre][code]# For more options and information see # http://rpf.io/configtxt # Some settings may impact device functionality. See link above for details # uncomment if you get no picture on HDMI for a default "safe" mode #hdmi_safe=1 # uncomment this if your display has a black border of unused pixels visible # and your display can output without overscan disable_overscan=1 # uncomment the following to adjust overscan. Use positive numbers if console # goes off screen, and negative if there is too much border #overscan_left=16 #overscan_right=16 #overscan_top=16 #overscan_bottom=16 # uncomment to force a console size. By default it will be display's size minus # overscan. #framebuffer_width=1280 #framebuffer_height=720 # uncomment if hdmi display is not detected and composite is being output hdmi_force_hotplug=1 # uncomment to force a specific HDMI mode (this will force VGA) hdmi_group=1 hdmi_mode=16 # uncomment to force a HDMI mode rather than DVI. This can make audio work in # DMT (computer monitor) modes #hdmi_drive=2 # uncomment to increase signal to HDMI, if you have interference, blanking, or # no display #config_hdmi_boost=4 # uncomment for composite PAL #sdtv_mode=2 #uncomment to overclock the arm. 700 MHz is the default. #arm_freq=800 # Uncomment some or all of these to enable the optional hardware interfaces dtparam=i2c_arm=on #dtparam=i2s=on dtparam=spi=on # Uncomment this to enable infrared communication. #dtoverlay=gpio-ir,gpio_pin=17 # Additional overlays and parameters are documented /boot/overlays/README # Enable audio (loads snd_bcm2835) dtparam=audio=on [pi4] # Enable DRM VC4 V3D driver on top of the dispmanx display stack dtoverlay=vc4-fkms-v3d max_framebuffers=2 [all] #dtoverlay=vc4-fkms-v3d # NOOBS Auto-generated Settings: start_x=1 gpu_mem=128 enable_uart=1 dtoverlay=w1-gpio dtoverlay=disable-bt #core_freq=250 force_turbo=1 avoid_warnings=1[/code][/pre] My current script works a lot better and also helped me narrow down the issue which seems to be when Rpi is transmitting. I also moved resistor on RS485 Pi which sits on Rpi to be able to gain better control over when to enter transmitter or reciever mode. [b]Rpi code[/b] [pre][code]import time import serial import RPi.GPIO as GPIO GPIO.setwarnings(False) GPIO.setmode(GPIO.BOARD) GPIO.setup(11, GPIO.OUT, initial=GPIO.LOW) ser = serial.Serial( port='/dev/serial0', baudrate = 115200, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, bytesize=serial.EIGHTBITS, timeout=1.5 ) ser.flush() while True: try: usr = input(">>> ") b = bytes(str(usr), encoding='utf-8') ser.write(b) ser.flush() GPIO.output(11, 1) tdata = ser.readall() if(tdata): #time.sleep(1) data_left = ser.inWaiting() tdata += ser.read(data_left) print(tdata) GPIO.output(11, 0) ser.flush() except ValueError as error: print(error) except IOError as error: print(error) [/code][/pre] [b]Arduino code[/b] [pre][code]#include HardwareSerial ser(1); int enablePin = 13; void setup() { Serial.begin(115200); ser.begin(115200, SERIAL_8N1, 16, 17); pinMode(enablePin, OUTPUT); digitalWrite(enablePin, HIGH); } void loop() { while (ser.available()) { String stringData = ser.readStringUntil('\n'); if(stringData != ""){ Serial.println("Received: " + stringData); } if(stringData == "Echo"){ digitalWrite(enablePin, LOW); ser.write("Hello from esp32"); ser.flush(); Serial.println("Transmitting: Hello from esp32"); digitalWrite(enablePin, HIGH); } } }[/code][/pre] So as long as i only send from Pi to esp32 everything works fine, once i trigger "Echo" such that esp32 goes into transmitter mode and Pi tries to recieve, the data gets corrupted and the only way to fix it is to restart python program. The wierd thing is that this is not happening everytime. [img]/docs/forumpost/bwdmmkx.png[/img] While running the program i checked which of the processess where using [b]/dev/ttyAMA0[/b] and it looked like that the python was the only one. [img]/docs/forumpost/armzxbd.png[/img]