{"id":1298,"date":"2015-06-23T03:40:06","date_gmt":"2015-06-22T13:40:06","guid":{"rendered":"http:\/\/commons.pratt.edu\/open-source\/?p=719"},"modified":"2015-06-23T03:40:06","modified_gmt":"2015-06-22T13:40:06","slug":"android-obdii-tool","status":"publish","type":"post","link":"https:\/\/www.kornequipped.com\/blog\/?p=1298","title":{"rendered":"Android OBDII Tool"},"content":{"rendered":"\n

After playing with AI2 for a couple of days and making simple apps  to test different features I wanted to try to make a useful tool. I decided on an OBDII scan tool for my Blazer. I was able to get a working prototype in just under one hour.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

I used a common ELM327 Bluetooth adapter I got for $12 a couple of years ago.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Since it was rainy most of the weekend I used my ECU simulator for most of the design work.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

I started with a simple interface.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

I added a terminal screen for oddball queries.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

I use a drop down for direct addressing to each module to get error codes. No parsing or DTC lookups yet but I can read the codes from the raw data.<\/p>\n\n\n\n

I took it outside and tested it on my truck. Sure enough it showed an ABS code my Innova scanner doesn’t see.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

the ABS module shows one code  “42 21” which translates to a “C0221”. You just remove the 2 high bits and convert that using this lookup table…<\/p>\n\n\n\n

‘A7 A6 First DTC character
\n‘– — ——————-
\n‘ 0 0 P – Powertrain
\n‘ 0 1 C – Chassis
\n‘ 1 0 B – Body
\n‘ 1 1 U – Network<\/span><\/b><\/span><\/p>\n\n\n\n

The code says the right front wheel sensor is open. It’s not broken I just have it unplugged since I was working on the brakes. At least I know it works better than a commercial $50 Scanner does…..<\/p>\n\n\n\n

I have to refine it and add DTC parsing.<\/p>\n","protected":false},"excerpt":{"rendered":"

After playing with AI2 for a couple of days and making simple apps  to test different features I wanted to try to make a useful tool. I decided on an OBDII scan tool for my Blazer. I was able to get a working prototype in just under one hour. I used a common ELM327 Bluetooth […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,7,17],"tags":[],"class_list":["post-1298","post","type-post","status-publish","format-standard","hentry","category-android","category-automotive","category-tools"],"_links":{"self":[{"href":"https:\/\/www.kornequipped.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1298","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kornequipped.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kornequipped.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kornequipped.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kornequipped.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1298"}],"version-history":[{"count":0,"href":"https:\/\/www.kornequipped.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1298\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.kornequipped.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1298"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kornequipped.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1298"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kornequipped.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1298"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}