# Requirements/how to program a WP76xx that is soldered to a custom board **URL:** \ **Category:** Build your own\ **Created:** [January 10, 2018, 8:46pm UTC](https://mangoh.discourse.group/t/requirements-how-to-program-a-wp76xx-that-is-soldered-to-a-custom-board/1072 "2018-01-10T20:46:29Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![griggs](https://avatars.discourse-cdn.com/v4/letter/g/ecccb3/32.png) [@griggs](https://mangoh.discourse.group/u/griggs)\ **Post date:** [January 10, 2018, 8:46pm UTC](https://mangoh.discourse.group/t/requirements-how-to-program-a-wp76xx-that-is-soldered-to-a-custom-board/1072/1 "2018-01-10T20:46:29Z")
We are laying out a board for a customer using a WP76xx chip. There will be custom apps on the chip. Environment is Legato 17.11 . UART 1 is brought out to other devices, so we can put a connector on that, using USB to RS232. Is there any other hardware or connections needed to program custom apps? ---
**Author:** ![dfrey](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/dfrey/32/303_2.png) [@dfrey](https://mangoh.discourse.group/u/dfrey)\ **Post date:** [January 11, 2018, 10:21pm UTC](https://mangoh.discourse.group/t/requirements-how-to-program-a-wp76xx-that-is-soldered-to-a-custom-board/1072/2 "2018-01-11T22:21:53Z")
Are you asking whether you can deploy apps to the wp76 by transferring them over UART1? ---
**Author:** ![griggs](https://avatars.discourse-cdn.com/v4/letter/g/ecccb3/32.png) [@griggs](https://mangoh.discourse.group/u/griggs)\ **Post date:** [January 11, 2018, 10:35pm UTC](https://mangoh.discourse.group/t/requirements-how-to-program-a-wp76xx-that-is-soldered-to-a-custom-board/1072/3 "2018-01-11T22:35:50Z")
Hi- Not just apps. We’ll need to re-flash Yocto with a custom build that has SFTP, plus apps. We brought UART1 out to a header, but the board was not designed for USB/CF3 support. Thanks, George- ---
**Author:** ![griggs](https://avatars.discourse-cdn.com/v4/letter/g/ecccb3/32.png) [@griggs](https://mangoh.discourse.group/u/griggs)\ **Post date:** [January 11, 2018, 10:42pm UTC](https://mangoh.discourse.group/t/requirements-how-to-program-a-wp76xx-that-is-soldered-to-a-custom-board/1072/4 "2018-01-11T22:42:42Z")
@dfrey Another thing we are seeing is this. the block below just keeps repeating. Any ideas what’s up? ============================================================== Format: Log Type - Time(microsec) - Message - Optional Info Log Type: B - Since Boot(Power On Reset), D - Delta, S - Statistic S - QC\_IMAGE\_VERSION\_STRING=BOOT.BF.3.1.2-00079 S - IMAGE\_VARIANT\_STRING=LAATANAZA S - OEM\_IMAGE\_VERSION\_STRING=jenkins S - Boot Config, 0x000002e1 B - 1216 - PBL, Start B - 3720 - bootable\_media\_detect\_entry, Start B - 4416 - bootable\_media\_detect\_success, Start B - 4420 - elf\_loader\_entry, Start B - 7873 - auth\_hash\_seg\_entry, Start B - 30971 - auth\_hash\_seg\_exit, Start B - 81112 - elf\_segs\_hash\_verify\_entry, Start B - 127878 - PBL, End B - 117181 - SBL1, Start B - 166865 - pm\_device\_init, Start B - 184586 - PM\_SET\_VAL:Skip D - 16409 - pm\_device\_init, Delta B - 185928 - boot\_config\_data\_table\_init, Start D - 174948 - boot\_config\_data\_table\_init, Delta - (420 Bytes) B - 364017 - CDT version:3,Platform ID:8,Major ID:1,Minor ID:0,Subtype:129 B - 370392 - sbl1\_ddr\_set\_params, Start B - 374113 - Pre\_DDR\_clock\_init, Start D - 213 - Pre\_DDR\_clock\_init, Delta D - 0 - sbl1\_ddr\_set\_params, Delta B - 386953 - pm\_driver\_init, Start D - 4483 - pm\_driver\_init, Delta B - 393145 - cpr\_init, Start D - 91 - cpr\_init, Delta B - 397811 - cpr\_cx\_mx\_apc\_vol\_update, Start D - 61 - cpr\_cx\_mx\_apc\_vol\_update, Delta B - 412970 - clock\_init, Start D - 152 - clock\_init, Delta B - 413183 - boot\_flash\_init, Start B - 416477 - Error code 303e at boot\_flash\_dev\_nand.c Line 606