![]() ![]() Document "advanced user guide" updated, refer to "revision history" inside. ![]() Solution 3: use a brand new microcontroller (Nucleo L476RG), with a totally new PCB, larger.The existing PCBs (v02, v03, v04) are not compatible at all, new PCB needed. Solution 2: use an external SPI-SRAM in QSPI configuration.It's a shame that I removed this chip inside v04, I'm very sorry, I thought is was useless. ![]() For PCB v04, I could provide a (very) cheap add-on board, easy to solder on top of the Nucleo. Solution 1 (prefered): use the existing SPI-SRAM (23LC1024) of PCB v02 or v03.I have 3 options, not decided yet, currently the 3 are under test: Important info : for future features, especially for the Masters, and for improving performances (buffer size), the RAM of the microcontroller is not big enough (64kB).Documentation updated (advanced user guide and introduction) : command "TX_test", adding a fan on the amplifier, setting the MTU to 750 for better performances.v02 and v03 already have the SPI-SRAM, and the future version v05 will have it also. I will provide soon (february) cheap add-on SRAM boards, and a new firmware (compatible with and without this SPI-SRAM). Important info: The solution 1 for upgrading the RAM (see below) is feasible, with external SPI SRAM.Advanced user guide updated, mainly in order to clarify IP config of modems (client modems).rest of the world : soon available at Funtronics - Elekitsorparts Warning, I have limited production capacities. Western-Europe : contact me f4hdkfreefr. You can buy these SPI-SRAM add-on boards from : ![]() In order to determine if you need SPI-SRAM upgrade, read the dedicated paragraph inside the "advanced user guide". You can upgrade the hardware of a modem v04 via adding a SPI-SRAM add-on board. Modems v04 (the one sold by Elekitsorparts-Funtronics up to march 2020) don't have the SPI-SRAM (it's my mistake, sorry). Modems v02 and v03 already have this SPI-SRAM chip. The usage of additionnal SPI-SRAM chip improves greatly performances, especially for Masters, by increasing the TX buffer length, and the SRAM chip is automatically detected and activated with the recent firmware 2020_02_23. The RAM of the microcontroller used is too limited to have good performances, especially at Master side.
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