B4R Question ESP 8266

Discussion in 'B4R Questions' started by jerryjukem, Sep 25, 2018.

  1. jerryjukem

    jerryjukem Member Licensed User

    I am trying to send serial out the tx pin on 8266. What is working: network data from tablet,lcd output displaying received data, using serial2, i do get something out of tx pin and the scope looks like serial, but using realterm to read data, nothing correct. If I send the number 1, I get a "g",number "2", I get a 3. Multiple characters it scrambles. I am 99% sure it is not baud as I have tried all the settings. What didnt work: software serial would not load, I think there are some pin conflicts internally. Any kind of example of using tablet to wifi to 8266 and 8266 uart out to pic chip(or any uart) would be helpful.
  2. BillMeyer

    BillMeyer Well-Known Member Licensed User

    May I ask a few questions ?
    1. Realterm I am not familiar with but I presume it is on a PC ?
    2. How did you make the connection from the ESP8266 to whatever where you were getting the wrong data from ? In other words - show us your wiring diagram.

    I have an idea where your problem might lie but need this information first before I make an assumption.
    klaus likes this.
  3. jerryjukem

    jerryjukem Member Licensed User

    I am going from the TX pin 8266 to com port pin on pc. I am only trying to transmit. Realterm is pc app that allows you to see activity on com ports, like teraterm app. you can adjust all settings to check baud rates, etc. I have been doing different uart stuff for years and understand about grounding, etc. At this time I do not know how to upload file contents, unless the answer is cut and paste.
    Thank you

    Attached Files:

  4. BillMeyer

    BillMeyer Well-Known Member Licensed User

    tigrot likes this.
  5. tigrot

    tigrot Well-Known Member Licensed User

    PC always uses an EIA level serial interface(-12V,+12V), Arduino has a native TTL/CMOS level(0V.+5V/3.3V) interface. So you need an interface converter, like Bill's suggestion. Better buy a module from market.
    Cableguy and BillMeyer like this.
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