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John Pilgrim

Member Since: January 6, 2010

Country: United States

  • The four of these I received are rather low quality. The thread profile on these isn't symmetrical as it should be for 5/8-11 UNC threads (https://en.wikipedia.org/wiki/Unified_Thread_Standard). One side of the thread profile is angled (as it should be) and the other drops right off. (Visualize a sawtooth wave as opposed to a triangle wave, and you'll get the idea.) Fortunately the side that's angled on mine happens to be the side that will be mating with and applying force to the corresponding threads of the antenna, but it's still disappointing. I had previously purchased (from Jeff Bezos' store) two "CAMVATE 1/4"-20 to 5/8"-11 Threaded Screw Adapters" that were beautifully machined in stainless steel, albeit for about twice the price of these here. Wish I'd just bought more of those.

  • Just a heads up...I'm using that same cable from Amazon, and it has worked fine for now, but I was disappointed that the TNC connector body is raw aluminum as opposed to chromed brass. Aluminum being so soft, I can't imagine the threads on the TNC are going to last that many screw-unscrew cycles compared to chromed brass or hard anodized aluminum. I look forward to getting SF's cable when it comes out.

  • Thanks Nate, that is helpful!

  • I saw those PTH in the description and photos in the hookup guide a. I'd ask that in future revisions that you added PTH for I2C and SPI.

    I suppose I could design and 3D print a case extension for the current design to provide an exterior M2 connector from the qwiic JSTs.

    Given the I2C clock stretching deficiencies in the RPi, making SPI accessible would be helpful. But at that point you're probably right that just putting an RTK breakout board in a generic enclosure is arguably a better approach.

  • On many levels, just bringing out more of the ZED communication pins (I2C, SPI, another UART) to through hole solder pads on the main circuit board would go a long way to enabling users to add on custom cables or connectors to daughter devices. Loose individual wires coming out of a JST on the surface of an enclosure aren't that professional looking nor mechanically sturdy. JST's aren't really "locking" in the way an M12 or D-series connector is.

    For example, I'm surveying rural properties and there are often trees and bushes grown up around the property corner fence posts. I need to get my survey pole right up next to the base of the fence post and pointing straight up to the sky (orthagonal to the ground) with the bubble level. So every wire between devices on the pole is an additional point of failure to get snagged and pulled out by a branch.

  • Interesting...can you share the names of the survey software packages you're referring to?

  • So then how (technically) are the mid- and high-end GPS Receivers communicating over Bluetooth with ESRI Collector on iOS devices?

    Here are the iOS Collector specs.

    To directly connect a Bluetooth receiver with an iOS device, the receiver has to be part of the MFi program as well as support the output of NMEA sentences.

    Please NO Apple bashing, this is a technical question and technically rigorous answers will be very much appreciated.

  • Curious (and lazy as I could go dig through the firmware code myself)...what are the default survey settings for survey time and survey accuracy when the device is in base station mode?

    Secondly, this device is awesome! I just last month built a ZED-F9P base/rover pair with Telemetry Serial Radios using the SF tutorial. Mine has integrated arduino and OLED display. I can tell this RTK Surveyor product is more streamlined and targeted for immediate use and less targeted for hacking, but I would really appreciate a brief section in the guide how to compile and upload revised/customised firmware, for those of us without an established ESP32 toolchain.

  • Regarding the Telemetry Serial Radios, can pairs of these radios be mixed and matched between the pairs that ship in each box, without any reconfiguration? In other words, if I buy two pairs of these radios (four in total, let's call them Pair1RadioA Pair1RadioB Pair2RadioA Pair2RadioB), can Pair1RadioA communicate with Pair2RadioA without reconfiguration? I am not asking about one-to-many, only about mixing one-to-one pairs. Thanks!

    PS: I haven't found any great manufacturer documentation of the radios. Nate, do you have a link to documentation of how you set the radios to "different net IDs."

  • This link in the guide is 404 as of 20201204: https://www.sparkfun.com/products/17496

No public wish lists :(