We are using ESP12E version and this interface with external host MCU via UART communication. We are able to send data to server using AT command, the following parameter and data size that we have used in our application.
1. Sending data size: 74Kbytes
2. AT command used: AT+CIPSTART using TCP, AT+CIPSEND, AT+CIPCLOSE.
3. External host MCU UART parameter setting:
flow control: diabled
For our critical problem is:
We are able to send this all data to server but it taking approx 1 minute for transmitting data to server. This problem is critical for us because our product is battery operated device using 2*1.5V AA size. So battery life is important feature in our application.
1. Why this taking too much time for transmission ?
2. Is any other parameter that i need to set in my code, Because we are communicating to ESP12E using AT command through UART?
3. What is the maximum speed for transmission data to server using AT cmd? Is any limitation?
4. Will you please suggest any best solution for increasing transmission speed to reduced this time improve battery life?
Looking forward your response..!!
We are still finding the solution for this problem, and until not get any help form here as well as from other espressif forum also.
I am waiting more for the answer of my question but still not able to give me solution ans well as suggestion for what should i do now?
Can anyone tell what is the maximum speed of ESP12E data transfer to server using AT command.
Is this module that i am using not able to transmit data fast, Should i need to change this module?
Looking forward for your reply. We have tested the transmission speed using transparent mode this and work as expected. But in this mode will chance to loss packet if internet speed is slow.
So we want to use normal mode with get ack on each packet sending. Will some one please help me for that to increase data transmitting speed to server using AT command.
For my question it almost consumed near about 1 year but still not get answer OR suggest solution form any one.
For you is this my question is very strange and also some one not able to give me any suggestion or solution. Please at lease for this question give me your answer so we can change our WiFi module into different vendor.
Because this is need to do before go for production manufacturing.
Looking forward your response asap very important for us...!!!
Mine is about 320kpbs @baud rate 420000.
As you said in UART-WiFi pass-through mode data packet is not loss but this mode is only working if you add delay between sending packet. As our tested result how much delay want to hard-coded in program, In datasheet specified 35ms delay. But this delay not work for us.
When we set 100ms it work but it depend on internet speed, If WiFi module is connected with 2G network speed this set delay not work means not send data to server it stuck and nothing any response from server as well as not from WiFi module.
We will test again with added UART flow control @420000 baudrate, But can you tell me
1. what is the purpose of add delay between sending packets to server.
2. Is this delay is depended on network speed?
Thanks you for ur supporting..!!
I never add any delay when using the UART-WiFi passthrough mode, just send the data..
If we are not add delay then some packets loss and send all data to server. In our hardware not added RTS and CTS pin so uart flow control is disabled.
Is this problem with that uart flow control disabled.
It would be wonder if you provide me sample example program snippet using UART-Wi-Fi through.
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