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projects:upshack [10/11/2013 23:26] admin |
projects:upshack [14/11/2013 15:57] (versione attuale) admin [Communication Protocol] |
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| But then I saw a predisposition for serial port... some checks and it worked! | But then I saw a predisposition for serial port... some checks and it worked! | ||
| - | === Warnings === | + | ===== Warnings ===== |
| This is a hack onto shock hazardous circuits. 230VAC (300VDC) are present everywhere also when everything shut down. | This is a hack onto shock hazardous circuits. 230VAC (300VDC) are present everywhere also when everything shut down. | ||
| Linea 21: | Linea 21: | ||
| **This hack is not 100% safe** | **This hack is not 100% safe** | ||
| - | === Adding the Fan === | + | ===== Adding the Fan ===== |
| {{:projects:smallhacks:img_0081.jpg?200|}} | {{:projects:smallhacks:img_0081.jpg?200|}} | ||
| Linea 31: | Linea 31: | ||
| Note. Fan wires ARE actually connected to MAINS. | Note. Fan wires ARE actually connected to MAINS. | ||
| - | === Adding the RS-232 interface === | + | ===== Adding the RS-232 interface ===== |
| {{:projects:smallhacks:detail2.jpg?300|}} | {{:projects:smallhacks:detail2.jpg?300|}} | ||
| Linea 44: | Linea 44: | ||
| Note. Opto-isolators separate RS-232 circuits (SAFE) from ups ttl circuits (NOT SAFE, connected to MAINS). | Note. Opto-isolators separate RS-232 circuits (SAFE) from ups ttl circuits (NOT SAFE, connected to MAINS). | ||
| - | == Solving a "problem" == | + | ==== Solving a "problem" ==== |
| Initially it did'nt work. This is what I got. | Initially it did'nt work. This is what I got. | ||
| Linea 55: | Linea 55: | ||
| {{:projects:smallhacks:conddtl.jpg?300|}} | {{:projects:smallhacks:conddtl.jpg?300|}} | ||
| - | === Communication Protocol === | + | ==== Communication Protocol ==== |
| - | == NUT rulez == | + | === NUT rulez === |
| It works with "network ups tools" ([[http://www.networkupstools.org/]]). The driver is called "**blazer_ser**". | It works with "network ups tools" ([[http://www.networkupstools.org/]]). The driver is called "**blazer_ser**". | ||
| Protocol used is "Megatec/Q1". | Protocol used is "Megatec/Q1". | ||
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| </file> | </file> | ||
| - | == Watching how the driver works (reversing protocol) == | + | === Watching how the driver works (reversing protocol) === |
| Link is 2400 baud, 8n1 | Link is 2400 baud, 8n1 | ||
| Linea 107: | Linea 107: | ||
| I don't know if other //commands// could be sent to the UPS, in addition to the shutdown. | I don't know if other //commands// could be sent to the UPS, in addition to the shutdown. | ||
| - | === Final hack === | + | === I'm a stupid === |
| + | **//Some day after//** | ||
| + | |||
| + | Source code of NUT and its drivers, including blazer, is available at [[http://www.networkupstools.org/download.html|NUT download page]]. | ||
| + | |||
| + | If you look in "blazer.c" and "blazer_ser.c" (in the drivers directory) you can understand how the protocol works. | ||
| + | |||
| + | **Answer data fields** | ||
| + | <code> | ||
| + | InputVoltage ; InputVoltageFault ; OutputVoltage ; UpsLoad ; InputFrequency ; BatteryVoltage ; UpsTemperature ; StatusBits | ||
| + | </code> | ||
| + | |||
| + | **StatusBits field** | ||
| + | <code> | ||
| + | bit if=1 if=0 | ||
| + | 0 utility fail (OB) online (OL) | ||
| + | 1 battery low (LB) battery good | ||
| + | 2 bypass/boost active normal | ||
| + | 4 offline/interactive online | ||
| + | 5 test in progress normal | ||
| + | 7 beeper on beeper off | ||
| + | </code> | ||
| + | |||
| + | ===== Final hack ===== | ||
| This is more likely a CISCO router related topic. However, I have connected the ups serial port to the router's AUX port and configured as ''modem inout''. | This is more likely a CISCO router related topic. However, I have connected the ups serial port to the router's AUX port and configured as ''modem inout''. | ||
| - | Now I can inquiry UPS status remotely connecting to the Cisco. In the next step I'll try to forward the remoted session to a virtual serial port. This can be usually achieved with unix **socat** command but in my case the Cisco asks for login before relaying to the serial port. | + | Now I can inquiry UPS status remotely connecting to the Cisco through a telnet session. |
| + | |||
| + | A small script in python has been written to keep the telnet connection alive and inquiry UPS status every 10 seconds. If there are problems a mail is sent. | ||
