<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class="">Looks interesting. A few comments:</span><div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=""><ol class="MailOutline"><li class="">Please don’t call this "OVMS v4", as that would cause confusion. Our ‘v’ naming is based on processor architecture:<br class=""><br class="">v1 - origjnal prototype hand-built (PIC18F2680)<br class="">v2 - first production version (PCI18F2685)<br class="">v3 - refined production version (ESP32 WROVER, 16MB flash 4MB SPIRAM)<br class=""><br class="">Within that we have a .x naming scheme for subversions. The current version is v3.2 and the upcoming 4G module will be v3.3.<br class=""><br class="">It sounds like you are trying to make a different layout of the upcoming version, so perhaps a fork of v3.3?<br class=""><br class="">My concern here is to avoid confusion.<br class=""><br class=""></li><li class="">SIM7600 sounds ok. That is the direction we are heading as well.<br class=""><br class=""></li><li class="">For ESP32 are you using WROVER module with 16MB flash and 4MB/8MB SPIRAM?<br class=""><br class=""></li><li class="">For things like ACC detection, full power control, RGB LED, which GPIO / extended-IO pins are you using?<br class=""><br class=""></li><li class="">It doesn’t look like you support the current expansion board option?<br class=""><br class=""></li><li class="">It seems that you are using a different vehicle connector, so this will be hardwired for Indian MG ZS EV?<br class=""><br class=""></li><li class="">Note that we removed the LED in v3 (it was in v2) due to power consumption issues with that.<br class=""><br class=""></li><li class="">How are you intending to handle firmware? A fork of the current code, or kconfig flags to support your hardware differences?</li></ol><div><br class=""></div><div>Regards, Mark,</div></div><div><br class=""><blockquote type="cite" class=""><div class="">On 9 Aug 2021, at 3:18 PM, <<a href="mailto:rohit@ekraft.asia" class="">rohit@ekraft.asia</a>> <<a href="mailto:rohit@ekraft.asia" class="">rohit@ekraft.asia</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta charset="UTF-8" class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Hello OVMS dev’s,<o:p class=""></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""> I am basically hardware designer planning to use the OVMS on my MG ZS EV ( Indian version ). For this I designed the hardware containing 4g module as well as all the components on single PCB.<o:p class=""></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Have a look on below:<o:p class=""></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span id="cid:image002.jpg@01D78D1C.E786A280"><image002.jpg></span><span id="cid:image004.jpg@01D78D1C.E786A280"><image004.jpg></span><o:p class=""></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""> Top Side Bottom side<o:p class=""></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">The hardware features are as follows:<o:p class=""></o:p></div><ol start="1" type="1" style="margin-bottom: 0cm; margin-top: 0cm;" class=""><li class="MsoListParagraph" style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">4G module with active GPS antenna support ( sim7600 )<o:p class=""></o:p></li><li class="MsoListParagraph" style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">ESP32 as main processor ( similar to ovms rev 3)<o:p class=""></o:p></li><li class="MsoListParagraph" style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">Sim and sd card in stacked single slot to save space<o:p class=""></o:p></li><li class="MsoListParagraph" style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">3 can bus ports<o:p class=""></o:p></li><li class="MsoListParagraph" style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">Battery backup in case need to use this device as security. On board charging<o:p class=""></o:p></li><li class="MsoListParagraph" style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">Accelero/ gyro combined low power device<o:p class=""></o:p></li><li class="MsoListParagraph" style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">ACC detection in case of supported from vehicle from OBD port<o:p class=""></o:p></li><li class="MsoListParagraph" style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">Fully power control of each and every component and low power sleep mode<o:p class=""></o:p></li><li class="MsoListParagraph" style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">Input power supply up-to 60 V<o:p class=""></o:p></li><li class="MsoListParagraph" style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">RGB led for status indication<o:p class=""></o:p></li></ol><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">The device case would be as below in which OBD connector would be there.<o:p class=""></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span id="cid:image007.jpg@01D78D1C.E786A280"><image007.jpg></span><span id="cid:image008.jpg@01D78D1C.E786A280"><image008.jpg></span><o:p class=""></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Do let me know if we need to add something so hardware is future ready.<span class="Apple-converted-space"> </span><o:p class=""></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Regards,<o:p class=""></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Rohit Soni<o:p class=""></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">+91-9660770212<o:p class=""></o:p></div></div><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">_______________________________________________</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); 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