serial-dmm: Expand a code comment.

diff --git a/src/hardware/serial-dmm/api.c b/src/hardware/serial-dmm/api.c
index a9f9cff81fcac132c498d1112317c27a7e052eae..5a2f13f104d9cd69ed6d557441158bc39879eba9 100644 (file)
--- a/src/hardware/serial-dmm/api.c
+++ b/src/hardware/serial-dmm/api.c
@@ -268,6 +268,9 @@ SR_REGISTER_DEV_DRIVER_LIST(serial_dmm_drivers,
         * "out" by .15%, and so is well within the typical 1% margin
         * that is considered acceptable in UART communication, and thus
         * should not cause an issue.
+        *
+        * However, using 19230 as baudrate here will not work, as most DMM
+        * cables do not support that baudrate!
         */
        DMM(
                "tenma-72-7750-ser", es519xx,