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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/C54WEABLF7BPSTBXQXK7XNPUTXOKFX5A/?format=api",
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    "message_id": "001201c80ac3$e41d6010$6432a8c0@LAPTOP9",
    "message_id_hash": "C54WEABLF7BPSTBXQXK7XNPUTXOKFX5A",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/6DHQXRPX7KGWVDDZKTZRULHRY2EJH6U6/?format=api",
    "sender": {
        "address": "howard (a) howardlong.com",
        "mailman_id": "82a1d3d58c6f48898b755d208f81930e",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/82a1d3d58c6f48898b755d208f81930e/emails/?format=api"
    },
    "sender_name": "Howard Long",
    "subject": "[amsat-bb] Re: LVB Tracker Box July/Aug 2007 AMSAT Journal",
    "date": "2007-10-09T22:29:43Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ER23PCVBR7AYRH2OI2TA466IQZV4DQVQ/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi Alan\n\n> However, it is unclear to me what the page 4 \" Ethernet interface capable\"\n> references.  Is it an alternative/addition to the USB and serial computer\n> interface?  If so, is there a daughter board that must be added?   At what\n> cost?  Is there a schematic for the DYI crowd? \n\nI apologise that until now I have never documented the Ethernet interface.\nTonight I reverse engineered the module that I built and tested about 3+\nyears ago. As you'll see it's not a rocket science module, being based on a\nLantronix XPORT device\nhttp://www.lantronix.com/device-networking/embedded-device-servers/xport.htm\nl, a couple of potential dividers to do the 5V to 3.3V conversion and a low\ndropout regulator.\n\nYou will need a fairly decent heatsink on the main board's 5V regulator with\nthe Ethernet header device. ISTR that the LDO was fine without a heatsink.\n\nhttp://www.g6lvb.com/Articles/LVBTracker/Ethernet/IMG_0057small.jpg\nhttp://www.g6lvb.com/Articles/LVBTracker/Ethernet/IMG_0058small.jpg\nhttp://www.g6lvb.com/Articles/LVBTracker/Ethernet/IMG_0059small.jpg\nhttp://www.g6lvb.com/Articles/LVBTracker/Ethernet/IMG_0061small.jpg\n\nYou will see in the photos a couple of transistors. These are not used. You\nshould still endeavour to program the PIC on the motherboard using a real\nhardware RS232 port rather than this Ethernet device or the USB header: this\nis to do with the way that the handshaking lines are emulated. Once\nprogrammed, remove the MAX232 and insert either the USB or the Ethernet\nmodule into the header and the device will operate directly with your\nfavourite tracking software.\n\nLike the USB header, the Ethernet uses COM port emulator software on the\nhost, although the transport to the device is IP.\n\nHope this helps.\n\n73, Howard G6LVB\n\n\n",
    "attachments": []
}