Recent content by geezer88

  1. geezer88

    My Analogue inputs (Pots) have very fine range of adjustment.

    In the top photo, number 1 position, righthand end you can see the metallic material extends almost to the 3 o'clock position. I can't tell on the other end, but I bet it is the same based on your measurements. I think you have gotten some special pots with linear taper and 180 degree active...
  2. geezer88

    Anyone Used Nextion Displays?

    Today the new altimeter chip arrived. I wasted no time soldering it in the circuit, THEN turning on the power. All works fine. Now I can finish up the code that allows relative readings. tom
  3. geezer88

    My Analogue inputs (Pots) have very fine range of adjustment.

    I would use a voltmeter to measure a few of the pots at 0, 25, 50, and 100% of rotation. Just by eye you should be able to see if there is something goofy with the pots. Wouldn't take more than ten minutes to do several. This would quickly sort out linear from log from big dead band at...
  4. geezer88

    Anyone Used Nextion Displays?

    Ibenson, If I read the manual correctly, hsersetup does not have a setting for M2 parts. Do I have that right? All, I have got it working now, though with: hsersetup b9600_32, %00 hserin b10 hserin b11 It turns out the trouble seems to be with the barometer chip. I'm not sure which of my...
  5. geezer88

    Mighty Mule Output Hack

    I have a long driveway, and it bugs me to have a car drive in when I'm not expecting it. I have used PIR (pasive infra red) devices to alarm in the house when we have visitors, but PIR systems have many false alarms from squirrels, deer, bobcats, coyotes, and skunks. I love the wildlife, but...
  6. geezer88

    Anyone Used Nextion Displays?

    Thanks for the suggestion, but I still get the right answer only about 1/10 tries. The user will only try to change this word now and then, so it seems like a blocking input with a fairly small timeout might be better. You are right about it not being reliable. I've got standard inputs to...
  7. geezer88

    Anyone Used Nextion Displays?

    I am working on an altimeter project using an 18M2, an MPL3115 altimeter board from Sparkfun, and a 240x320 enhanced display from Nextion. I have used the program from rq3, on this forum, as the beginning point. My first implementation used the Nex to display results and set the local...
  8. geezer88

    Anyone Used Nextion Displays?

    Yikes! I've got a grandfather clock with a mechanical movement that does about 20 seconds per week. I'm glad you warned me about the rtc. I will forget about it for anything needing long term accuracy. I've seen posts on other forums about the non-square pixels on the bigger displays. I...
  9. geezer88

    Anyone Used Nextion Displays?

    If the photo were better, you can see some of the support structure and unlit digits. I just got the photos off internet, but with a quality camera setup, and the real McCoy, I think they would look pretty good. l spent the morning fooling with this, and don't have more than a passing interest...
  10. geezer88

    Anyone Used Nextion Displays?

    Your comment got me to thinking the nextion could replace nixie tubes. Here's a photo of the smallest nextion emulating a nixie display. Ambient light, reflections, my shaky hands, and some interaction with my camera and the display make for a not nearly as good as real life view, but you can...
  11. geezer88

    Anyone Used Nextion Displays?

    I've printed it out, and am digesting it now. My best learning technique is by studying examples, so this really helps. thanks, tom
  12. geezer88

    Anyone Used Nextion Displays?

    A week ago I received my Nextion 2.4" display in the mail, in a few hours time I was able to design a simple altimeter screen that shows the altitude, it's metric or english units, the current barometer setting, and the barometer units. My picaxe 18m2 reads an i2c sensor, makes the barometer...
  13. geezer88

    Displays for 2019

    I think Alan has the answer to my problem above: two many pullups on the i2c bus. But, for now, my original question has been answered by the Nextion display. I have just received the small, advanced one and in spite of the learning curve on my 70 year old brain, it has a lot to offer. The...
  14. geezer88

    Displays for 2019

    I bought one of those, too. It works fine, but beside needing the care and feeding of a nibble interface, it seems to interfere with the i2c altimeter I'm wanting it for. The display works fine by itself, and the altimeter works fine with a serial display, but the two itc devices won't play...
  15. geezer88

    Displays for 2019

    Pretty funny about semaphores and flamethrowers. The semaphore idea just popped into my head as I was writing that post. I hadn't known about the past history. Been off the Picaxe trail for several years. Looking at the shop section of this website, there are some serial displays. The...
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