LinkSprite Camera with TTL Serial

[KarinaMendez]

Sorry, forgot to comment the Spark.function(), I don't use it.

I just flash the core via usb with the code in the particle build page, then I ask for the serial monitor's data with this code:

import binascii
import serial
import sys
from twython import Twython
import os

nf = open("atTheDoor.jpg","wb")
ser = serial.Serial('/dev/cu.usbmodem1411', 9600) # Establish the connection on a specific port

cont = 1;
str_buffer = ""

def tweet():
print("now tweet")
photo = open('atTheDoor.jpg','rb')
api = Twython(CONSUMER_KEY,CONSUMER_SECRET,ACCESS_KEY,ACCESS_SECRET)
api.update_status_with_media(media=photo, status='My spark be tweeting images now => @carlocotto')
photo.close()
print("donde tweeting")

while 1:
c = ser.read() # Read the newest output from the Arduino
print c
if c == '+':
print('end')
print('yaaa se acabo la foto')
tweet()
break
str_buffer = str_buffer + c
# cada 4 caracteres escribe al archivo de salida
if cont % 4 == 0:
print(str_buffer)
#print(ser.read())
nf.write(binascii.a2b_hex(str_buffer))
# se reinicia el buffer y el contador
str_buffer = ""
cont = 1
else:
cont = cont + 1

Close the file

#nf.close()

I just need the serial port problem fixed, everything else works fine.

[kennethlimcp]

It might be /dev/tty. if i remember correctly. Can you try using a terminal software to see if the device is listed there?

[KarinaMendez]

Still having the same problem, when I ask for “particle serial list” says “no devices available via serial”

[ScruffR]

Have you tried my short test sketch from above?

[KarinaMendez]

Yes, and it gave me this error:

error: too few arguments to function 'void digitalWrite(uint16_t, uint8_t)'

so I replaced it for a "HIGH", asked for the serial monitor and still said "no device available via serial"

[ScruffR]

That was a typo, which has been corrected already digitalWrite(D7, !digitalRead(D7));

If this sketch doesn’t work, I’d expect you’ve got a problem with your USB port, USB cable or computer and not the Core.

[KarinaMendez]

Is there any other way I could see the serial monitor than the command line?

[ScruffR]

Maybe @kennethlimcp can help here since I have no clue about Mac.
But I’ve heard about CoolTerm, if this helps.

[bko]

Hi @KarinaMendez

I use CoolTerm or just the command line tool screen on my Mac. Both work great. You will have to figure out which device in /dev/ is your Photon. The easiest way is to just list the /dev/ directory before and after connecting it.

http://freeware.the-meiers.org/

http://hints.macworld.com/article.php?story=20061109133825654

[KarinaMendez]

I know witch one is it: dev/cu.usbmodem1411, it appears when I ask for the particle serial list before flashing the code, but after flashing any code, there’s no serial ports available…

[bko]

Hi @KarinaMendez

If this is a Core, then the USB device only get enumerated and shows up after your firmware does Serial.begin(baudRate);.

If this is a Photon, it normally enumerates the device by default.

By the way, the name can change if you plug in other USB devices with serial capability.

[KarinaMendez]

Something that happens is that when I set it up with the command line to the cloud, it never passes the step “claiming core to your account”.

[ScruffR]

@bko

If this is a Core, then the USB device only get enumerated and shows up after your firmware does Serial.begin(baudRate);.

If this is a Photon, it normally enumerates the device by default.

This is what I keep trying to get accross too!

@ScruffR

There is no Serial.begin() in that sample, so you won't find a COM port open.

@ScruffR

You won't see the port if it's not opened by the device via Serial.begin().(At least true for the Core FW 0.3.4, the Photon does open the USB serial by default)

[KarinaMendez]

By any chance do you have an example of how to post data from spark to a database? Been trying some like

from pyspark.sql import SQLContext

but it's not working