Sending an array of arrays of uint8_t and char
Posted: Sun Jun 09, 2019 3:27 amHi every one
I have a sensor that should send 1KB data every 40ms. I want to send this through ESP8266 (Nodemcu) to my laptop. This is my code:
In this Code, i have 2 problem:
1- How to send an array of array of uint8_t through WiFi? (Each 1KB data(=Data_mem[j]) should send in one seprate packet)
In this code i get this error:
call of overloaded 'println(uint8_t [1024])' is ambiguous
2- If i want to send char instead of uint8_t, data sent. But what received is not 10 * 1024 =10240 bits. They are 56320 bits!(I have copied received data of packet sender in Word and get the number of characters ('G'))
Note that it is true for sending client.println(Data_mem[0]) and is 1024 bit.
I need both array of array of uint8_t and char.
Thanks
I have a sensor that should send 1KB data every 40ms. I want to send this through ESP8266 (Nodemcu) to my laptop. This is my code:
Code: Select all
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
/* Put your SSID & Password */
const char* ssid = "NodeMCU"; // Enter SSID here
const char* password = "12345678"; //Enter Password here
char Data_mem[10][1024];
uint8_t Data_mem2[10][1024];
int a=0;
/* Put IP Address details */
IPAddress local_ip(192,168,1,1);
IPAddress gateway(192,168,1,1);
IPAddress subnet(255,255,255,0);
//ESP8266WebServer server(80);
WiFiServer server(80);
void setup() {
Serial.begin(115200);
WiFi.softAP(ssid, password);
WiFi.softAPConfig(local_ip, gateway, subnet);
delay(100);
server.begin();
server.setNoDelay(true);// Don't Permit TCP Buffering
Serial.println("HTTP server started");
//Data Init
for(int j=0;j<10;j++){
for(int i=0;i<1024;i++) {
Data_mem[j][i]='G';
}
}
for(int j=0;j<10;j++){
for(int i=0;i<1024;i++) {
Data_mem2[j][i]=10;
}
}
}
void loop () {
WiFiClient client = server.available();
if (client) {
if (client.connected()){
if(a==0){
a=1;
for(int j=0;j<10;j++)
client.println(Data_mem2[j]);
}
else{
client.stop(); // terminates the connection with the client
}
}
}
}
In this Code, i have 2 problem:
1- How to send an array of array of uint8_t through WiFi? (Each 1KB data(=Data_mem[j]) should send in one seprate packet)
In this code i get this error:
call of overloaded 'println(uint8_t [1024])' is ambiguous
2- If i want to send char instead of uint8_t, data sent. But what received is not 10 * 1024 =10240 bits. They are 56320 bits!(I have copied received data of packet sender in Word and get the number of characters ('G'))
Note that it is true for sending client.println(Data_mem[0]) and is 1024 bit.
I need both array of array of uint8_t and char.
Thanks