An ESP8266 SDK Firmware with AT command to submit data to Google Form.

Features

• Directly submitting data to Google Form.
• SSL implemented for submitting data (As Google forced it)

USAGE

AT+GFORMSUBMIT=<Google_form_ID>,<Total_entries_n>,<Entry_1_data>,<Entry_2_data>,<Entry_n_data>,...

Where:

<Google_form_ID> = Your Google Form ID

<Total_entries_n> = Total entries that will be submitted to Google Form, usually this equals to how many text box/input in your form

<Entry_n_data> = Data to be submitted, must in the form of name and value pair, i.e.: entry.1335153026=data_for_this_entry

EXAMPLE

• Given the form link is:

  https://docs.google.com/forms/d/1bg-8CAyVF3Rq3Q_1Z87BLxUrE4aKB1AEMhkXyQAl-u4/viewform

• <Google_form_ID> = 1bg-8CAyVF3Rq3Q_1Z87BLxUrE4aKB1AEMhkXyQAl-u4

• <Total_entries_n> = 2

• Entry IDs = entry.1335153026, entry.1490820559

  (Try to view source code of the form, or follow this to get the pre-filled link to extract the entry IDs)

Execute the following command to submit the Google Form

AT+GFORMSUBMIT=1bg-8CAyVF3Rq3Q_1Z87BLxUrE4aKB1AEMhkXyQAl-u4,2,entry.1335153026=answer_for_question_one,entry.1490820559=answer_for_question_two

NOTE

• Try not to put big (lengthy) data, the ESP8266 does not have much RAM after we used the SSL library
• Request packet buffer size is 224, could be changed in at_gformCmd.c, but it is recommended not to modify the value.
• SSL buffer size is 4608, could be changed in at_gformCmd.c, but it is recommended not to modify the value.
• Comma (,) is not allowed in any fields including <Google_form_ID>, <Entry_n_data>
• Remember to put \r\n after each command (complies with the original AT FW specifications)

KNOWN BUG

• Application may reset when sending command too fast
• Need to add packet echo to avoid data drop (very weird)