esp32

问题 I need the system to be secure. I tired to encode the image with base64 and sending the string via MQTT to Iot Core. Then decode the string with a cloud function and finally storage the decoded image in Google Cloud Storage. The problem is the limited size of a message in MQTT. Using a Cloud Function and then storage in Google Cloud Storage is not really secure, anyone could hit that url and I loos control of all the ESP32CAM comunication. Am I missing something? is there a really secure way

问题 I'm trying to convert single images into it's depthmap , but I can't find any useful tutorial or documentation. I'd like to use opencv, but if you know a way to get the depth map using for example tensorflow, I'd be glad to hear it. There are numerous tutorials for stereo vision but I want to make it cheaper because it's for a project to help blind people. I'm currently using esp32 cam to stream frame by frame and receiving the images on python using opencv. 回答1: Usually, we need a

问题 I have the following code in my C header file: typedef struct mb32_packet_t { uint8_t compid; uint8_t servid; uint8_t payload[248]; uint8_t checksum; } __attribute__((packed)) mb32_packet_s; Doing the following works: struct mb32_packet_t packet; When using this: mb32_packet_t packet; I get: Type 'mb32_packet_t' could not be resolved Unknown type name 'mb32_packet_t'; use 'struct' keyword to refer to the type Isn't typedef struct intended for exactly this purpose, i.e. to be able to omit the

问题 I have the following code in my C header file: typedef struct mb32_packet_t { uint8_t compid; uint8_t servid; uint8_t payload[248]; uint8_t checksum; } __attribute__((packed)) mb32_packet_s; Doing the following works: struct mb32_packet_t packet; When using this: mb32_packet_t packet; I get: Type 'mb32_packet_t' could not be resolved Unknown type name 'mb32_packet_t'; use 'struct' keyword to refer to the type Isn't typedef struct intended for exactly this purpose, i.e. to be able to omit the

问题 I am working on a project using ESP32, I get some data from some sensors and send it to a webpage hosted in the same board. I read some info on the web and understood that is "better" to send all data from several sensors using json method, so my function to get and send data is this: void handle_leituras() { String results_json = "{ \"data\": " + Data + "," + "\"hora\": " + Hora + "," + "\"temp_amb1\": " + Tout + " }"; server.send(200, "application/json", results_json); } Testing above

问题 hi im having error with this code but it runs in python shell could any body help me from machine import Pin import time import network import urequests p0 = Pin(0,Pin.OUT) wlan = network.WLAN(network.STA_IF) wlan.active(True) wlan.connect('ssid', 'pass') response = urequests.get('http://jsonplaceholder.typicode.com/albums/1') while True: ans = response.json()['userId'] p0.value(1) time.sleep(1) p0.off() time.sleep(1) print('ok') and this is the error: Traceback (most recent call last): File

问题 hi im having error with this code but it runs in python shell could any body help me from machine import Pin import time import network import urequests p0 = Pin(0,Pin.OUT) wlan = network.WLAN(network.STA_IF) wlan.active(True) wlan.connect('ssid', 'pass') response = urequests.get('http://jsonplaceholder.typicode.com/albums/1') while True: ans = response.json()['userId'] p0.value(1) time.sleep(1) p0.off() time.sleep(1) print('ok') and this is the error: Traceback (most recent call last): File

问题 I have a file that contains a list of about forty thousand integers that are space delimited, with each integer between the value of 0 and 255. It is this file here: https://github.com/johnlai2004/sound-project/blob/master/integers.txt If you connect a speaker to an ESP32 breakout board, then run this list of integers through the digital to analog converter at a frequency of 24kHz, you will hear the sentence, "That's not the post that you missed." What I want to know is how do you use FFMPEG

问题 I have a file that contains a list of about forty thousand integers that are space delimited, with each integer between the value of 0 and 255. It is this file here: https://github.com/johnlai2004/sound-project/blob/master/integers.txt If you connect a speaker to an ESP32 breakout board, then run this list of integers through the digital to analog converter at a frequency of 24kHz, you will hear the sentence, "That's not the post that you missed." What I want to know is how do you use FFMPEG

来源： https://stackoverflow.com/questions/63634917/freertos-task-should-not-return-esp32