Changes by last author:
Changed:
| All 4 types are used on GenBoard/VerThree. |
|
All 4 types are used on VEMS GenBoard/VerThree, plus
* 1-wire (used for I-Button security) * CAN (used for BMW S65 electronic "DBW" CAN-throttles and idle valve) |
| ** RS485 (with auto-dir RS232-RS485 adapter) is [sometimes] used on 2nd serial port to query data (modbus or triggerframe protocol) eg. by PLC (mostly in powerplants; modbus slave; and sometimes modbus master to control frequency inverter for biomass-feed augers and section-flaps) |
| MAX232 onboard or in cable |
| ST232 / MAX232 onboard or in cable |
| * if the onboard max232 breaks, detecting the exact problem is needed (very tough), SMD unsoldering is needed (tough) and a new max232 (easy to ship, easy to solder normally, not so easy to solder on unsoldered pads). If the max232 in the cable breaks, just get another cable (it is very cheap and easy to locate the problem - swap in another). Anyone can stock a few RS232-FBUS or USB-FBUS cable the same way as he stocks DB9 connector or DSUB9 extension cables ) Note: what if the AVR breaks in the field? Should we build from NPN transistors because they are more likely to be available in the drawer :-) |
| * if the onboard max232 breaks, detecting the exact problem is needed (very tough), SMD unsoldering is needed (tough) and a new max232 (easy to ship, easy to solder). If the max232 in the cable breaks, just get another cable (it is very cheap and easy to locate the problem - swap in another). Anyone can stock a few RS232-FBUS or USB-FBUS cable the same way as he stocks DB9 connector or DSUB9 extension cables ) Note: what if the AVR breaks in the field? Should we build from NPN transistors because they are more likely to be available in the drawer :-) |
| * SerialPortPm - developers only |