A quick hack to Network UPS Tools(NUT) "blazer_usb" driver to use OMRON UPS on NetBSD/OpenBSD.

nut-2.6.5-obsd-omron-ups.patch

--- nut-2.6.5/drivers/blazer_usb.c.orig	Wed Aug  1 02:38:59 2012
+++ nut-2.6.5/drivers/blazer_usb.c	Mon Oct 21 00:04:22 2013
@@ -173,8 +173,8 @@
 
 static int ippon_command(const char *cmd, char *buf, size_t buflen)
 {
-	char	tmp[64];
-	int	ret;
+	char	tmp[64], tmp2[64];
+	int	ret, len1;
 	size_t	i;
 
 	snprintf(tmp, sizeof(tmp), "%s", cmd);
@@ -183,7 +183,7 @@
 
 		/* Write data in 8-byte chunks */
 		ret = usb_control_msg(udev, USB_ENDPOINT_OUT + USB_TYPE_CLASS + USB_RECIP_INTERFACE,
-			0x09, 0x2, 0, &tmp[i], 8, 1000);
+			0x09, 0x200, 0, &tmp[i], 8, 1000);
 
 		if (ret <= 0) {
 			upsdebugx(3, "send: %s", (ret != -ETIMEDOUT) ? usb_strerror() : "Connection timed out");
@@ -206,9 +206,36 @@
 	}
 
 	snprintf(buf, buflen, "%.*s", ret, tmp);
+	len1 = ret;
 
-	upsdebugx(3, "read: %.*s", (int)strcspn(buf, "\r"), buf);
-	return ret;
+	upsdebugx(5, "read1: %.*s", (int)strcspn(buf, "\r"), buf);
+
+	/*
+	 * XXX:
+	 * On {Net,Open}BSD + libusb + OMRON UPS, it seems that we can not get
+	 * whole data at once.  So we wait a while (1 sec here), read the rest,
+	 * and concatenate them.
+	 */
+	sleep(1);
+
+	/* Read all 64 bytes of the reply in one large chunk, second time */
+	ret = usb_interrupt_read(udev, 0x81, tmp2, sizeof(tmp2), 1000);
+
+	/*
+	 * Any errors here mean that we are unable to read a reply (which
+	 * will happen after successfully writing a command to the UPS)
+	 */
+	if (ret <= 0) {
+		fprintf(stderr, "read2: %s", (ret != -ETIMEDOUT) ? usb_strerror() : "Connection timed out");
+		return ret;
+	}
+
+	snprintf(&buf[len1], buflen - len1, "%.*s", ret, tmp2);
+
+	upsdebugx(5, "read2: %.*s", (int)strcspn(&buf[len1], "\r"), &buf[len1]);
+	upsdebugx(3, "read:%.*s", (int)strcspn(buf, "\r"), buf);
+
+	return len1 + ret;
 }
 
 
 

Quick guide to use OMRON UPS on NetBSD/OpenBSD with NUT(Network UPS Tools)

ABSOLUTELY NO WARRANTY

1. The UPS must be recognized as a ugen(4) device. You may edit the kernel source and make the customized kernel like http://openbsd.7691.n7.nabble.com/feature-request-OMRON-BX50F-UPS-not-recognized-as-ugen-tc190332.html#none
2. Build and install nut-2.6.5 package in pkgsrc/ports tree, with above patch.
3. In 'ups.conf' configuration file, set blazer_usb as 'driver' and ippon as 'subdriver'. Also set vendorid and productid of the UPS. Here is my example:

[by35s]
driver = blazer_usb
port = auto
desc = "OMRON BY35S"
vendorid = 0590
productid = 0080
subdriver = ippon
default.battery.voltage.high = 13.6
default.battery.voltage.low = 11.5