'embeded' 카테고리의 글 목록 (3 Page)

'embeded'에 해당되는 글 1341건

esp32-cam에 AT 펌웨어 넣기 실패 (0)	2023.12.14
esp32 at 펌웨어 (0)	2023.12.12
esp8266 wifi AT 명령어 예제 (0)	2023.12.12
esp32-s2 adc (0)	2023.12.11
esp32 oled i2c (0)	2023.12.11

esp8266 wifi AT 명령어 예제

다음 (daum.net)의 주소를 이용해서 한번 받아오려고 했는데 먼가 안 맞는지 안된다.

CIPSEND=18인데 14 + CR + LF 해도 먼가 안 맞는데 엔터가 한번 더 들어가야 해서 그런가?

GET / HTTP/1.0<엔터><엔터>

일단 google.com 은 잘 되는 듯. daum.net이 문제인가?

AT+CWMODE?

+CWMODE:2

OK
AT+CWMODE=1

OK
AT+CWLAP

+CWLAP:(3,"WIFI 1",-75,"00:00:00:00:00:00",1,1,0)
+CWLAP:(3,"WIFI 2",-70,"00:00:00:00:00:00",1,-19,0)
+CWLAP:(3,"WIFI 3",-89,"00:00:00:00:00:00",1,-17,0)
+CWLAP:(3,"WIFI 4",-82,"00:00:00:00:00:00",1,-21,0)
+CWLAP:(0,"WIFI 5",-89,"00:00:00:00:00:00",2,-21,0)
+CWLAP:(4,"WIFI 6",-89,"00:00:00:00:00:00",1,-24,0)

OK
AT+CWJAP="WIFI 1","password"

WIFI CONNECTED
WIFI GOT IP

OK
AT+CWQAP

OK
WIFI DISCONNECT
AT+CWJAP="WIFI 1","password"

WIFI CONNECTED
WIFI GOT IP

OK
AT+CIPSTA?

+CIPSTA:ip:"192.168.0.55"
+CIPSTA:gateway:"192.168.10.1"
+CIPSTA:netmask:"255.255.0.0"

OK
AT+CIPSTATUS

STATUS:2

OK
AT+CIPSTART="TCP","211.249.220.24",80

CONNECT

OK
AT+CIPSEND=18

OK
>
Recv 18 bytes

SEND OK

+IPD,280:HTTP/1.1 400 Bad Request
Date: Wed, 13 Dec 2023 05:05:16 GMT
Content-Type: text/html
Content-Length: 150
Connection: close

<html>
<head><title>400 Bad Request</title></head>
<body>
<center><h1>400 Bad Request</h1></center>
<hr><center>nginx</center>
</body>
</html>
CLOSED

[링크 : https://m.blog.naver.com/ajkun/220214336816]

[링크 : https://blog.naver.com/ssshin22/220868021464]

[링크 : https://wiki.seeedstudio.com/WiFi_Serial_Transceiver_Module/]

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esp8266 wifi at 명령어

AT+RST와 리셋 버튼의 메시지가 많이 다르게 나온다.

AT+RST

OK

ets Jan  8 2013,rst cause:2, boot mode:(3,7)

load 0x40100000, len 2408, room 16
tail 8
chksum 0xe5
load 0x3ffe8000, len 776, room 0
tail 8
chksum 0x84
load 0x3ffe8310, len 632, room 0
tail 8
chksum 0xd8
csum 0xd8

2nd boot version : 1.6
  SPI Speed      : 40MHz
  SPI Mode       : QIO
  SPI Flash Size & Map: 32Mbit(512KB+512KB)
jump to run user1 @ 1000

⸮⸮n⸮r⸮⸮n|⸮ll⸮$`⸮rl⸮l⸮l`⸮rl⸮l⸮l`⸮rl$⸮ll`rl$rl⸮bbČb⸮bbr⸮$b⸮n'nn⸮l⸮l⸮l⸮ll⸮l⸮⸮⸮⸮$`⸮n⸮bbll$b⸮⸮bbl⸮brlrl
ready

기본은 AP 모드로 되어있는 것 같고

AT+CWMODE?
+CWMODE:2

OK

FaryLink_F81835 라는 SSID로 검색되고 접속된다.

AT+CWSAP?
+CWSAP:"FaryLink_F81835","",1,0,4,0

OK

핸드폰이 192.168.4.2로 붙었는데 MAC이 안드로이드에서 나오는 거랑 다르다. 머지?

AT+CWLIF
192.168.4.2,0e:f8:ff:00:00:00

OK

핸드폰에서 붙이면 이렇게 붙는데, 저 MAC은 도대체 누구꺼냐 -ㅁ-?

노트북꺼 붙이니 제대로 뜨는데, 핸드폰은 왜 다르지?

AT+CWLIF
192.168.4.2,0e:f8:ff:00:00:00
192.168.4.3,8c:55:4a:28:25:bc

OK

요건 노트북 MAC

$ ifconfig
wlo1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1280
        inet 192.168.4.3  netmask 255.255.255.0  broadcast 192.168.4.255
        inet6 fe80::9169:c7eb:3e76:3204  prefixlen 64  scopeid 0x20<link>
        ether 8c:55:4a:28:25:bc  txqueuelen 1000  (Ethernet)
        RX packets 2431961  bytes 301079066 (301.0 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 205909  bytes 25249933 (25.2 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

status가 5는 멀 의미하는지 모르겠다. 한개 더 붙었다고 느는것도 아니고 머지?

프로토콜 문서 찾아보니 5번은 wifi에 연결되지 않았다. 머 AP 모드니까 당연한건가?

AT+CIPSTATUS
STATUS:5

OK

[링크 : https://www.espressif.com/sites/default/files/4a-esp8266_at_instruction_set_en_v1.5.4_0.pdf]

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Posted by 구차니

esp32-s2 adc

eps8266은 10bit / esp32는 12bit인데

WiFi 끄면 100KSPS (이론상 2MSPS)

WiFi 켜면 1KSPS 정도 겨우 하는듯 하다.

내장 ADC로 사운드 입력으로 쓸 수 있으려나 했는데 무리일 듯.

ADC sampling rate: can reach 100000 times per second with Wi-Fi turned off, and 1000 times per second with Wi-Fi turned on.

[링크 : https://espressif-docs.readthedocs-hosted.com/projects/esp-faq/en/latest/software-framework/peripherals/adc.html]

[링크 : https://docs.espressif.com/projects/esp-idf/en/v4.4/esp32/api-reference/peripherals/adc.html]

Resolution (bit)	Speed (ksps)
ADC_WIDTH_BIT_9	27.1739
ADC_WIDTH_BIT_10	27.1739
ADC_WIDTH_BIT_11	27.1739
ADC_WIDTH_BIT_12	27.1739

[링크 : https://www.labfruits.com/esp32-adc-speed/]

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esp32 oled i2c

SPI 사기 전에는 일단 이걸로 테스트 해봐야겠군..

[링크 : https://stemwith.github.io/2021/09/26/ESP32-OLED/]

[링크 : https://randomnerdtutorials.com/esp32-ssd1306-oled-display-arduino-ide/]

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esp8266 nodemcu v3 기본 펌웨어

minicom이나 리눅스용 putty로 쇼를 해도 안되서

결국에는 arduino 설치하고 시리얼 터미널로 테스트하니 응답한다

Both NL & CR로 해주어야 응답한다. (망할!)

[링크 : https://techposts.org/flash-nodemcu-v3-stock-firmware/]

[링크 : https://github.com/sleemanj/ESP8266_Simple/blob/master/firmware/README.md]

v1.1.1
ai-thinker-v1.1.1.bin

the default baud rate is 115200
Important Note: The AT command must be end with "\r\n". For Arduino, must type the AT command like this

Serial1.print("AT+GMR\r\n");

Not like this:

Serial1.println("AT+GMR");

So the hardwareSerialMonitor sketch will not work now.

v0.9.5.2
ai-thinker-0.9.5.2-9600.bin
The default baud rate is 9600
ai-thinker-0.9.5.2.bin
The default baud rate is 115200
AT+GMR

AT version:0.21.0.0
SDK version:0.9.5

v0.9.5 beta
ai-thinker-0.9.5.bin
AT+GMR

00200.9.5(b1)
compiled @ Dec 25 2014 21:40:28
AI-THINKER Dec4

[링크 : https://wiki.aprbrother.com/en/Firmware_For_ESP8266.html]

어디서 받아야하나?

[링크 : https://www.espressif.com/en/support/download/at]

+

AT 명령어

[링크 : https://blog.naver.com/ssshin22/220868021464]

[링크 : https://www.espressif.com/sites/default/files/4a-esp8266_at_instruction_set_en_v1.5.4_0.pdf]

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esp8266 esptool.py

ubuntu 22.04에서 brltty를 삭제하고 하라고 한다.

[링크 : https://stackoverflow.com/questions/70123431/why-would-ch341-uart-is-disconnected-from-ttyusb]

패키지 설치는 아래의 명령어를 사용하면 끝!

$ sudo apt remove brltty
$ git clone https://github.com/espressif/esptool.git
$ pip install intelhex
$ pip install pyserial
$ cd esptool

아따.. 읽어 보기도 힘드네 -_-

$ ./esptool.py --port /dev/ttyUSB0 read_flash_status
esptool.py v4.6.2
Serial port /dev/ttyUSB0
Connecting....
Detecting chip type... Unsupported detection protocol, switching and trying again...
Connecting....
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
MAC: bc:ff:4d:f8:18:35
Uploading stub...
Running stub...
Stub running...
Status value: 0x0000
Hard resetting via RTS pin...

$ ./esptool.py --port /dev/ttyUSB0 flash_id
esptool.py v4.6.2
Serial port /dev/ttyUSB0
Connecting....
Detecting chip type... Unsupported detection protocol, switching and trying again...
Connecting....
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
MAC: bc:ff:4d:f8:18:35
Uploading stub...
Running stub...
Stub running...
Manufacturer: d8
Device: 4016
Detected flash size: 4MB
Hard resetting via RTS pin...

$ ./esptool.py --port /dev/ttyUSB0 chip_id
esptool.py v4.6.2
Serial port /dev/ttyUSB0
Connecting....
Detecting chip type... Unsupported detection protocol, switching and trying again...
Connecting....
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
MAC: bc:ff:4d:f8:18:35
Uploading stub...
Running stub...
Stub running...
Chip ID: 0x00f81835
Hard resetting via RTS pin...

$ ./esptool.py -h
usage: esptool [-h]
               [--chip {auto,esp8266,esp32,esp32s2,esp32s3beta2,esp32s3,esp32c3,esp32c6beta,esp32h2beta1,esp32h2beta2,esp32c2,esp32c6,esp32h2,esp32p4}]
               [--port PORT] [--baud BAUD]
               [--before {default_reset,usb_reset,no_reset,no_reset_no_sync}]
               [--after {hard_reset,soft_reset,no_reset,no_reset_stub}] [--no-stub] [--trace]
               [--override-vddsdio [{1.8V,1.9V,OFF}]] [--connect-attempts CONNECT_ATTEMPTS]
               {load_ram,dump_mem,read_mem,write_mem,write_flash,run,image_info,make_image,elf2image,read_mac,chip_id,flash_id,read_flash_status,write_flash_status,read_flash,verify_flash,erase_flash,erase_region,merge_bin,get_security_info,version}
               ...

esptool.py v4.6.2 - Espressif chips ROM Bootloader Utility

positional arguments:
  {load_ram,dump_mem,read_mem,write_mem,write_flash,run,image_info,make_image,elf2image,read_mac,chip_id,flash_id,read_flash_status,write_flash_status,read_flash,verify_flash,erase_flash,erase_region,merge_bin,get_security_info,version}
                        Run esptool.py {command} -h for additional help
    load_ram            Download an image to RAM and execute
    dump_mem            Dump arbitrary memory to disk
    read_mem            Read arbitrary memory location
    write_mem           Read-modify-write to arbitrary memory location
    write_flash         Write a binary blob to flash
    run                 Run application code in flash
    image_info          Dump headers from a binary file (bootloader or application)
    make_image          Create an application image from binary files
    elf2image           Create an application image from ELF file
    read_mac            Read MAC address from OTP ROM
    chip_id             Read Chip ID from OTP ROM
    flash_id            Read SPI flash manufacturer and device ID
    read_flash_status   Read SPI flash status register
    write_flash_status  Write SPI flash status register
    read_flash          Read SPI flash content
    verify_flash        Verify a binary blob against flash
    erase_flash         Perform Chip Erase on SPI flash
    erase_region        Erase a region of the flash
    merge_bin           Merge multiple raw binary files into a single file for later flashing
    get_security_info   Get some security-related data
    version             Print esptool version

options:
  -h, --help            show this help message and exit
  --chip {auto,esp8266,esp32,esp32s2,esp32s3beta2,esp32s3,esp32c3,esp32c6beta,esp32h2beta1,esp32h2beta2,esp32c2,esp32c6,esp32h2,esp32p4}, -c {auto,esp8266,esp32,esp32s2,esp32s3beta2,esp32s3,esp32c3,esp32c6beta,esp32h2beta1,esp32h2beta2,esp32c2,esp32c6,esp32h2,esp32p4}
                        Target chip type
  --port PORT, -p PORT  Serial port device
  --baud BAUD, -b BAUD  Serial port baud rate used when flashing/reading
  --before {default_reset,usb_reset,no_reset,no_reset_no_sync}
                        What to do before connecting to the chip
  --after {hard_reset,soft_reset,no_reset,no_reset_stub}, -a {hard_reset,soft_reset,no_reset,no_reset_stub}
                        What to do after esptool.py is finished
  --no-stub             Disable launching the flasher stub, only talk to ROM bootloader. Some features
                        will not be available.
  --trace, -t           Enable trace-level output of esptool.py interactions.
  --override-vddsdio [{1.8V,1.9V,OFF}]
                        Override ESP32 VDDSDIO internal voltage regulator (use with care)
  --connect-attempts CONNECT_ATTEMPTS
                        Number of attempts to connect, negative or 0 for infinite. Default: 7.

[링크 : https://github.com/espressif/esptool]

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esp8266 microUSB 연결 2

115200bps 로 설정해서 reset 누르니 아래와 같이 먼가 나오긴 한데..

pcb 뒷편에는 CH340G 드라이버 설치하고 9600bps로 연결하라고 하는데 머가 맞는걸까?

봉투에서 뜯은녀석이라 다른 프로그램이 들어있는건 아닐텐데..

�brlrl
ready

dmseg로 확인하면 아래와 같이 인식된다. CH341? CH340G 라고 한거 같은디..

normal boot

[  528.742541] usb 2-1.1: new full-speed USB device number 11 using ehci-pci
[  528.851812] usb 2-1.1: New USB device found, idVendor=1a86, idProduct=7523, bcdDevice= 2.54
[  528.851831] usb 2-1.1: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[  528.851838] usb 2-1.1: Product: USB2.0-Ser!
[  528.852466] ch341 2-1.1:1.0: ch341-uart converter detected
[  528.854364] ch341-uart ttyUSB0: break control not supported, using simulated break
[  528.854604] usb 2-1.1: ch341-uart converter now attached to ttyUSB0

flash 버튼 누르고 부팅하면 아래와 같이 조금더 나온다.

그런데 BRLTTY가 머하는걸까? USB 플래시 처럼인식은 안되나보네

flash 버튼 누르고 boot 메시지

[  455.103387] usb 2-1.1: new full-speed USB device number 10 using ehci-pci
[  455.213032] usb 2-1.1: New USB device found, idVendor=1a86, idProduct=7523, bcdDevice= 2.54
[  455.213052] usb 2-1.1: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[  455.213059] usb 2-1.1: Product: USB2.0-Ser!
[  455.213892] ch341 2-1.1:1.0: ch341-uart converter detected
[  455.214821] ch341-uart ttyUSB0: break control not supported, using simulated break
[  455.215109] usb 2-1.1: ch341-uart converter now attached to ttyUSB0
[  455.792404] input: BRLTTY 6.4 Linux Screen Driver Keyboard as /devices/virtual/input/input27
[  455.880634] usb 2-1.1: usbfs: interface 0 claimed by ch341 while 'brltty' sets config #1
[  455.881356] ch341-uart ttyUSB0: ch341-uart converter now disconnected from ttyUSB0
[  455.881387] ch341 2-1.1:1.0: device disconnected

일반 권한

$ brltty
BRLTTY 6.4 rev BRLTTY-6.4 [https://brltty.app/]
brltty: can't isolate namespaces
brltty: executing as the invoking user: falinux
brltty: can't set supplementary groups
brltty: group not joined: 0(root)
brltty: group not joined: 5(tty)
brltty: group not joined: 29(audio)
brltty: group not joined: 107(input)
brltty: group not joined: 133(pulse-access)
brltty: required capability not granted: cap_sys_admin (for injecting input characters typed on a braille device)
brltty: required capability not granted: cap_sys_tty_config (for playing alert tunes via the built-in PC speaker)
brltty: required capability not granted: cap_mknod (for creating needed but missing special device files)

root 권한

$ sudo brltty
BRLTTY 6.4 rev BRLTTY-6.4 [https://brltty.app/]
brltty: executing as the invoking user: root

두번 실행하니 먼가 5초에 한번 주기적으로 뜬다. 멀까?

(그냥 프롬프트가 뜨길래 먼가했는데 백그라운드로 brltty가 실행되고 있어서 뜨는 메시지 였음)

[450328.072373] input: BRLTTY 6.4 Linux Screen Driver Keyboard as /devices/virtual/input/input36
[450351.379981] input: BRLTTY 6.4 Linux Screen Driver Keyboard as /devices/virtual/input/input37
[450351.389760] usb 1-2.4.2: usbfs: interface 0 claimed by usbfs while 'brltty' sets config #1
[450356.391459] usb 1-2.4.2: usbfs: interface 0 claimed by usbfs while 'brltty' sets config #1
[450361.393130] usb 1-2.4.2: usbfs: interface 0 claimed by usbfs while 'brltty' sets config #1
[450366.397596] usb 1-2.4.2: usbfs: interface 0 claimed by usbfs while 'brltty' sets config #1
[450371.400305] usb 1-2.4.2: usbfs: interface 0 claimed by usbfs while 'brltty' sets config #1
[450376.389840] usb 1-2.4.2: usbfs: interface 0 claimed by usbfs while 'brltty' sets config #1
[450381.395540] usb 1-2.4.2: usbfs: interface 0 claimed by usbfs while 'brltty' sets config #1
[450386.401519] usb 1-2.4.2: usbfs: interface 0 claimed by usbfs while 'brltty' sets config #1
[450391.397008] usb 1-2.4.2: usbfs: interface 0 claimed by usbfs while 'brltty' sets config #1
[450396.389537] usb 1-2.4.2: usbfs: interface 0 claimed by usbfs while 'brltty' sets config #1
[450401.402252] usb 1-2.4.2: usbfs: interface 0 claimed by usbfs while 'brltty' sets config #1
[450406.395525] usb 1-2.4.2: usbfs: interface 0 claimed by usbfs while 'brltty' sets config #1

[링크 : https://linux.die.net/man/1/brltty]

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esp8266 arduino

https://arduino.esp8266.com/stable/package_esp8266com_index.json
https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_dev_index.json

[링크 : https://github.com/esp8266/Arduino/blob/master/package/package_esp8266com_index.template.json]

[링크 : https://github.com/esp8266/Arduino]

[링크 : https://m.blog.naver.com/elepartsblog/221453102971]

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Posted by 구차니

esp32 freertos

esp32는 arduino ide를이용해서 하는데

대충 esp32 설치하고 나서 예시를 찾아보는데 기본 예시에서는 freertos가 없는 것 같다.

esp-idf(IoT Development Framework)을 나중에 설치해봐야 할 것 같은데..?

[링크 : https://docs.espressif.com/projects/esp-idf/en/latest/esp32/get-started/]

[링크 : https://www.vompressor.com/windows-clion-esp_idf/#google_vignette]

[링크 : https://github.com/DiegoPaezA/ESP32-freeRTOS]

[링크 : https://slowbootkernelhacks.blogspot.com/2020/12/esp32-freertos.html]

[링크 : https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/freertos.html]

[링크 : https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/freertos_idf.html]

[링크 : https://blog.naver.com/serimo/221560776476]

[링크 : https://poinsystem.tistory.com/3]

[링크 : https://poinsystem.tistory.com/2]

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