diff --git a/pocket/iocontrol.lua b/pocket/iocontrol.lua
index 1d2b77c..3d52e68 100644
--- a/pocket/iocontrol.lua
+++ b/pocket/iocontrol.lua
@@ -3,7 +3,7 @@
 --
 
 local const = require("scada-common.constants")
-local log   = require("scada-common.log")
+-- local log   = require("scada-common.log")
 local psil  = require("scada-common.psil")
 local types = require("scada-common.types")
 local util  = require("scada-common.util")
diff --git a/pocket/startup.lua b/pocket/startup.lua
index 0d2be64..33832da 100644
--- a/pocket/startup.lua
+++ b/pocket/startup.lua
@@ -3,7 +3,7 @@
 --
 
 ---@diagnostic disable-next-line: undefined-global
-local _is_pocket_env = pocket or periphemu
+local _is_pocket_env = pocket ~= nil or periphemu ~= nil
 
 require("/initenv").init_env()
 
diff --git a/pocket/ui/pages/guide_section.lua b/pocket/ui/pages/guide_section.lua
index a9e9596..63e2333 100644
--- a/pocket/ui/pages/guide_section.lua
+++ b/pocket/ui/pages/guide_section.lua
@@ -36,7 +36,7 @@ return function (data, base_page, title, items, scroll_height)
     local name_list = ListBox{parent=section_div,x=1,y=3,scroll_height=30,nav_fg_bg=cpair(colors.lightGray,colors.gray),nav_active=cpair(colors.white,colors.gray)}
     local def_list = ListBox{parent=section_view_div,x=1,y=3,scroll_height=scroll_height,nav_fg_bg=cpair(colors.lightGray,colors.gray),nav_active=cpair(colors.white,colors.gray)}
 
-    local _end = nil
+    local _end
 
     for i = 1, #items do
         local item = items[i] ---@type pocket_doc_item
diff --git a/pocket/ui/pages/unit_reactor.lua b/pocket/ui/pages/unit_reactor.lua
index 6990e92..7446d78 100644
--- a/pocket/ui/pages/unit_reactor.lua
+++ b/pocket/ui/pages/unit_reactor.lua
@@ -20,12 +20,11 @@ local PushButton     = require("graphics.elements.controls.push_button")
 local ALIGN = core.ALIGN
 local cpair = core.cpair
 
-local label       = style.label
-local lu_col      = style.label_unit_pair
-local text_fg     = style.text_fg
-local mode_states = style.icon_states.mode_states
-local red_ind_s   = style.icon_states.red_ind_s
-local yel_ind_s   = style.icon_states.yel_ind_s
+local label     = style.label
+local lu_col    = style.label_unit_pair
+local text_fg   = style.text_fg
+local red_ind_s = style.icon_states.red_ind_s
+local yel_ind_s = style.icon_states.yel_ind_s
 
 -- create a reactor view in the unit app
 ---@param app pocket_app
diff --git a/pocket/ui/pages/unit_turbine.lua b/pocket/ui/pages/unit_turbine.lua
index b4d9a2e..5a7763b 100644
--- a/pocket/ui/pages/unit_turbine.lua
+++ b/pocket/ui/pages/unit_turbine.lua
@@ -109,8 +109,8 @@ return function (app, u_page, panes, tbn_pane, u_id, t_id, ps, update)
     local rotation = DataIndicator{parent=tbn_ext_div,x=1,y=10,lu_colors=lu_col,label="",unit="",format="%21.12f",value=0,width=21,fg_bg=text_fg}
 
     rotation.register(ps, "steam", function ()
-        local status, result = pcall(function () return util.turbine_rotation(db.units[u_id].turbine_data_tbl[t_id]) end)
-        if status then rotation.update(result) end
+        local ok, result = pcall(function () return util.turbine_rotation(db.units[u_id].turbine_data_tbl[t_id]) end)
+        if ok then rotation.update(result) end
     end)
 
     return tbn_page.nav_to