Forum >Replies by cielle
Replies （9）
- You Reply: Hi hector,
My 9V adapter output 1A. - You Reply: Hi hector,
My 9V adapter output 1A. - You Reply: Hi,
Are u meaning connect the device with both USB and adapter together?
Sorry that i don't get you.
Anyway, i have measured some voltage reading. Result value are as below:
Pin Wifishield(V) SL018(v) Remark
[color=purple]+5 4.8 4.8 USB + Wifi (Wifi not connected not router)
A3 3.4 3.4
A4 3.4 3.4
A4 3.4 3.4[/color]
[color=green]+5 3.4 3.4 Adapter + Wifi (LED works, Failed for RFID)
A3 0 0
A4 2.6 2.6
A4 2.6 2.6[/color]
[color=brown]+5 5.2 5.2 USB (LED and RFID works)
A3 3.2 3.2
A4 3.8 3.8
A4 3.8 3.8[/color]
Testing with merely adapter omitted.
According to the obtained result, it seems like USB supply more power for kit.
But it doesn't work for WIFI module.
Please advise, is it ok for me to plugged a 9V adapter instead of 5V?
As i am worried 9V might burn my thing.
I tried to plugged 9V before. But my wifi shield get very hot and LAN connection is very unable.
I need to power up the kit with adapter as at the end the system is gonna to be a stand alone system without power support from PC.
Please advise again!
Many thanks!!! - You Reply: Hi,
Are u meaning connect the device with both USB and adapter together?
Sorry that i don't get you.
Anyway, i have measured some voltage reading. Result value are as below:
Pin Wifishield(V) SL018(v) Remark
[color=purple]+5 4.8 4.8 USB + Wifi (Wifi not connected not router)
A3 3.4 3.4
A4 3.4 3.4
A4 3.4 3.4[/color]
[color=green]+5 3.4 3.4 Adapter + Wifi (LED works, Failed for RFID)
A3 0 0
A4 2.6 2.6
A4 2.6 2.6[/color]
[color=brown]+5 5.2 5.2 USB (LED and RFID works)
A3 3.2 3.2
A4 3.8 3.8
A4 3.8 3.8[/color]
Testing with merely adapter omitted.
According to the obtained result, it seems like USB supply more power for kit.
But it doesn't work for WIFI module.
Please advise, is it ok for me to plugged a 9V adapter instead of 5V?
As i am worried 9V might burn my thing.
I tried to plugged 9V before. But my wifi shield get very hot and LAN connection is very unable.
I need to power up the kit with adapter as at the end the system is gonna to be a stand alone system without power support from PC.
Please advise again!
Many thanks!!! - You Reply: Hi admin, can i have your advise???
I find no where to debug on this...
Many thanks here! - You Reply: Hi admin, can i have your advise???
I find no where to debug on this...
Many thanks here! - You Reply: Hi admin,
many thanks for your prompt reply.
yes, i have tested for my wifi shield (with adapter 5V and 2A)
i managed to control my LED over the network with TCP Client communication but failed for my rfid reader. (the RFID reader doesn't have its red light blink when i power up the kit and doesn't have its green light blinked when i scan it with a mifare card)
On the other hand,
i have tested same code by using USB power supply from PC.
i can control LED and get rfid reader to read the card with Serial communication.
But the wifi shield failed to connect to router in TCP client communication. Would this because of the power from USB not hight enough for the wifi shield to connect to router?
What is the adapter i should used in order to make the both wifi shield and SL018 rfid tag reader works?
Before this, i used a 9V adapter. the Wifi shield end up too hot and causing unstable LAN connection. Luckily i didn't burnt my wifi shield. Then i replace the 9V adapter to 5V adapter.
below is my code (i modify from those tutorial for testing purpose)
LEC_RFID.pde
[code]
#include <Wire.h>
#include <SL018.h>
SL018 rfid;
void setup() {
Wire.begin();
Serial.begin(57600);
pinMode(13, OUTPUT);
delay(100);
Serial.println("Press any key to continue");
while(Serial.available()==0);
Serial.println(" Lets test the DFRobot WiFi Shield");
Serial.println("Press 1 to light the LED, and 0 to turn it off, 2 to read rfid");
Serial.println("Entery: ");
digitalWrite(13, HIGH);
}
void loop() {
if (Serial.available()){
char input = Serial.read();
switch (input){
case '1':
digitalWrite(13, HIGH);
Serial.println("ON");
delay(500);
break;
case '0':
digitalWrite(13, LOW);
Serial.println("OFF");
delay(500);
break;
case '2':
Serial.println("RFID:");
// start seek mode
rfid.seekTag();
// wait until tag detected
while(!rfid.available());
// print tag id
Serial.println("The tag ID: ");
Serial.print(rfid.getTagString());
break;
}
}
}[/code]
The connections between Wiznet wifi shield - SL018 are as below:
Wiznet wifi shield / SL018
A3/1
A4/2
A5/3
5V/4
GND/5
(SL018 datasheet :http://www.stronglink.cn/download/SL018-User-Manual.pdf)
Hope to have your advise again..
many thanks! - You Reply: Hi admin,
many thanks for your prompt reply.
yes, i have tested for my wifi shield (with adapter 5V and 2A)
i managed to control my LED over the network with TCP Client communication but failed for my rfid reader. (the RFID reader doesn't have its red light blink when i power up the kit and doesn't have its green light blinked when i scan it with a mifare card)
On the other hand,
i have tested same code by using USB power supply from PC.
i can control LED and get rfid reader to read the card with Serial communication.
But the wifi shield failed to connect to router in TCP client communication. Would this because of the power from USB not hight enough for the wifi shield to connect to router?
What is the adapter i should used in order to make the both wifi shield and SL018 rfid tag reader works?
Before this, i used a 9V adapter. the Wifi shield end up too hot and causing unstable LAN connection. Luckily i didn't burnt my wifi shield. Then i replace the 9V adapter to 5V adapter.
below is my code (i modify from those tutorial for testing purpose)
LEC_RFID.pde
[code]
#include <Wire.h>
#include <SL018.h>
SL018 rfid;
void setup() {
Wire.begin();
Serial.begin(57600);
pinMode(13, OUTPUT);
delay(100);
Serial.println("Press any key to continue");
while(Serial.available()==0);
Serial.println(" Lets test the DFRobot WiFi Shield");
Serial.println("Press 1 to light the LED, and 0 to turn it off, 2 to read rfid");
Serial.println("Entery: ");
digitalWrite(13, HIGH);
}
void loop() {
if (Serial.available()){
char input = Serial.read();
switch (input){
case '1':
digitalWrite(13, HIGH);
Serial.println("ON");
delay(500);
break;
case '0':
digitalWrite(13, LOW);
Serial.println("OFF");
delay(500);
break;
case '2':
Serial.println("RFID:");
// start seek mode
rfid.seekTag();
// wait until tag detected
while(!rfid.available());
// print tag id
Serial.println("The tag ID: ");
Serial.print(rfid.getTagString());
break;
}
}
}[/code]
The connections between Wiznet wifi shield - SL018 are as below:
Wiznet wifi shield / SL018
A3/1
A4/2
A5/3
5V/4
GND/5
(SL018 datasheet :http://www.stronglink.cn/download/SL018-User-Manual.pdf)
Hope to have your advise again..
many thanks! - You Reply: Hi admin,
May i have your advise for below?
I am about to integrate my SL018 rfid reader with WIZnet wifi shied on a arduino kit.
But sad to say that
I found that the SL018 only functioning (can read the mifare card) if the the arduino kit is powered up by USB cable (power supply from PC) .. But this provided voltage is not sufficient for my wifi shield to connect to router.
Then, i power up the arduino kit with 5V 2A AC adapter. My wifi shield is able to function at this power but the SL018 doesn't function.
Does the type of adapter would give effect on this?
As i browsed the manual of SL018, stating it require 4.5 to 7.0 VDC supply voltage..
Then may i know does the wifi shield works on a DC adapter? (For now AC adapter works on my wifi shield but not for SL018). I wish to have your confirmation before purchase a new adapter 5V DC adapter.
Please advise..
And appreciate for your time and your aids!
cielle