![\"\"](\"https:\/\/www.sevenwatt.com\/main\/wp-content\/uploads\/2023\/12\/Nugget-coolbox-traces-1024x810.png\")
<\/a><\/figure>\n\n\n\nNext to the observation that byte 1 (u41 in graph) in message 0x04 contains a bit that indicates the compressor is running, there is a bit that shows the opposite behaviour: byte 3 (u43). Coolbox level in the top right is the decoded byte 1 of 0x01.\u00a0<\/p>\n
The byte 3 of 0x04 contains some more status bits. Those are related to the ignition state of the car part of the nugget. Bit 2 is indication that the engine is running while bit 0 reflects that the contact of the car is on (0 = on). Byte 0 of 0x04 are also indicating the car contact is on and the engine is running. I expect that 0x04 contains some more information on the electrical pathways in the Nugget, but due to may Camper battery condition I can not test it at the moment.<\/p>\n
Finally 0x02 contains the sensor data for the outdoor and indoor temperature sensors as displayed on the touchscreen. And I have found some water tapping related bits in 0x01 and 0x02. Below is the current state of knowledge on those 3 message ID’s:<\/p>\n\n\n\n
\n--------------------------------------------------------------------------------\n? Touchscreen central controller ?\nID : 0x01\ndata: 00 30 00 00 00 00 00 00\n | | | | | | | | \n AA | | | | | | | = b0: 0.4-0.5s high when operating display\n | | | | | | | b1: waterpump 0=off 1=on\n CB | | | | | | = High nibble (b5,b4): coolbox level setpoint 0-5\n ?? | | | | | \n ?? | | | |\n ?? | | |\n ?? | |\n ?? |\n ??\n \n--------------------------------------------------------------------------------\n? Central controller (sensors?) ?\nID : 0x02\ndata: 5C 5F D7 D7 0B 03 00 00\n | | | | | | | | \n TO | | | | | | | = T-outside ((120-x)\/2 \u00b0C)\n TI | | | | | | = T-inside ((120-x)\/2 \u00b0C)\n ?? | | | | | \n ?? | | | |\n CT | | | = T-coolbox (25-x \u00b0C)\n GF | | = Water level indicators Grey and Fresh water values 0-5\n HH | = 0x40 for 0.4-0.5s when menu operated.\n AA = b0: watertap 0=closed 1=open \n\n--------------------------------------------------------------------------------\n? coolbox + car signals ?\nID : 0x04\ndata: 00 02 00 (mostly 3-byte frames)\ndata: 00 00 00 3B 13 00 00 01 (periodically 8-byte frames)\n | | | | | | | |\n AA | | | | | | | = 0x01 car contact on 0x05 car engine running\n CS | | | | | | = Coolbox compressor running 0x00 off, 0x02 = on\n ?? | | | | | \n BB | | | | = normally 0x3B, 0x36 car engine running\n | | | | b0: 0 = contact on\n | | | | b1: 1 = coolbox compressor runs\n | | | | b2: 1 = engine running\n CT | | | = Coolbox temperature sensor. same as ID 0x02 CT\n ?? | |\n CC | = 0x40 for 0.4-0.5s when heater setpoint changed\n ??\n \n--------------------------------------------------------------------------------\n<\/pre><\/P>\n","protected":false},"excerpt":{"rendered":"The messages related to the coolbox are detected for message ID’s 0x01, 0x02 and 0x04. I associated message ID 0x01 with the Touch screen operating display and in case of the coolbox this message ID contains the setting of the cooling level of the coolbox. Message ID 0x02 and 0x04 may be associated with a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[79,80,78],"tags":[],"class_list":["post-723","post","type-post","status-publish","format-standard","hentry","category-esp32","category-ford-nugget","category-linbus"],"_links":{"self":[{"href":"https:\/\/www.sevenwatt.com\/main\/wp-json\/wp\/v2\/posts\/723","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sevenwatt.com\/main\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sevenwatt.com\/main\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sevenwatt.com\/main\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sevenwatt.com\/main\/wp-json\/wp\/v2\/comments?post=723"}],"version-history":[{"count":5,"href":"https:\/\/www.sevenwatt.com\/main\/wp-json\/wp\/v2\/posts\/723\/revisions"}],"predecessor-version":[{"id":733,"href":"https:\/\/www.sevenwatt.com\/main\/wp-json\/wp\/v2\/posts\/723\/revisions\/733"}],"wp:attachment":[{"href":"https:\/\/www.sevenwatt.com\/main\/wp-json\/wp\/v2\/media?parent=723"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sevenwatt.com\/main\/wp-json\/wp\/v2\/categories?post=723"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sevenwatt.com\/main\/wp-json\/wp\/v2\/tags?post=723"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"\"](\"https:\/\/www.sevenwatt.com\/main\/wp-content\/uploads\/2023\/12\/Nugget-Coolbox.png\")
<\/a><\/figure>\n\n\n\n