I’m trying to get some telemetry working between a mobile robot and a PC over bluetooth.<\/p>\n
[http:\/\/bricxcc.sourceforge.net\/nbc\/ NXC] has all the features you need to send messages between robots and a PC. There are functions to send boolean, integers and so on, using a “mailbox” dispatching of messages, for example ”SendRemoteNumber”.
\n
\nI’m trying to get some telemetry working between a mobile robot and a PC over bluetooth.<\/p>\n
[http:\/\/bricxcc.sourceforge.net\/nbc\/ NXC] has all the features you need to send messages between robots and a PC. There are functions to send boolean, integers and so on, using a “mailbox” dispatching of messages, for example ”SendRemoteNumber”. However I’ve decided to use the simpler ”BluetoothWrite” primitive.<\/p>\n
And here’s what I got at the other side, sending strings of ‘*’ of progressive length:<\/p>\n
$ cat < \/dev\/rfcomm0 | od -cx\n 0000000 001 \\0 \\0 002 \\0 * \\0 003 \\0 * * \\0 004 \\0 * *\n 0001 0200 2a00 0300 2a00 002a 0004 2a2a\n 0000020 * \\0 005 \\0 * * * * \\0 006 \\0 * * * * *\n 002a 0005 2a2a 2a2a 0600 2a00 2a2a 2a2a\n\nIn summary, each message sent with ''BluetoothWrite'' results on the PC in the payload length coded on 2 bytes, LSB, then the data sent, including a trailing \\0 if you send a string without converting it to a byte array first.\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"
I’m trying to get some telemetry working between a mobile robot and a PC over bluetooth. [http:\/\/bricxcc.sourceforge.net\/nbc\/ NXC] has all the features you need to […]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-338","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/tronche.com\/blog\/wp-json\/wp\/v2\/posts\/338","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tronche.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tronche.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tronche.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tronche.com\/blog\/wp-json\/wp\/v2\/comments?post=338"}],"version-history":[{"count":0,"href":"https:\/\/tronche.com\/blog\/wp-json\/wp\/v2\/posts\/338\/revisions"}],"wp:attachment":[{"href":"https:\/\/tronche.com\/blog\/wp-json\/wp\/v2\/media?parent=338"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tronche.com\/blog\/wp-json\/wp\/v2\/categories?post=338"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tronche.com\/blog\/wp-json\/wp\/v2\/tags?post=338"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}